The cockroach mite
The cockroach mite, Pimeliaphilus podapolipophagus
Representative Protozoa associated with cockroaches
Representative Protozoa associated with cockroaches. A, Monocercomonoides melolonthae, X 3094 (after Grassé). B, Coelosporidium periplanetae, X 1310 (after Sprague); trophozoite with spores and chromatoid bodies. C, Endamoeba blattae, X 273 (after Kudo); trophozoite. D, Lophomonas striata, X 330 (after Kudo). E, Lophomonas blattarum, X 660 (after Kudo). F, Retortamonas blattae, X 3094 (after Wenrich). G, Nyctotherus ovalis, X 175 (after Kudo). H, Gregarina rhyparobiae, c. X 52: mature trophozoite attached to intestinal wall of Leucophaea maderae. (Redrawn from J. M. Watson [1945].) I, Diplocystis schneideri, c. X 14.4 (after Kunstler). J, Gregarina blattarum, c. X 57 (after Kudo). K, Protomagalhaesia serpentula, X 36 (after Pinto). L, Gamocystis tenax, magnification not known (after Schneider).
Relationship between a mature plant of Herpomyces stylopygae and the integument of Blatta orientalis
Diagram illustrating the relationship between a mature plant of Herpomyces stylopygae and the integument of Blatta orientalis. Richards and Smith have studied the life history of Herpomyces stylopygae on the oriental cockroach. The plants grow only on living cockroaches, and the infection is disseminated by contact.
Protozoa from the gut of the wood-feeding cockroach
Protozoa from the gut of the wood-feeding cockroach Cryptocercus punctulatus. A, Eucomonympha imla, female above, male below, c. X 375. (From Cleveland [1950c].) B, Barbulanympha sp. (From Cleveland [1953].) C, Urinympha talea, c. X 712. (From Cleveland [1951a].) D, Rhynchonympha tarda, c. X 450. (From Cleveland [1952].) E, Trichonympha okolona or T. algoa, c. X 390.
Mouth appendages of cockroach
Mouth appendages of Periplaneta (magnified). A Mandible B First maxilla 1 cardo 2 stipes 3 lacinia 4 galea 5 palp C Right and left second maxillae fused to form the labium 1 submentum 2 mentum 3 ligula, corresponding to the lacinia 4 paraglossa, corresponding to the galea 5 palp (From Latter.)
Longitudinal section of Female Cockroach
Longitudinal section of Female Cockroach, to show the position of the principal organs. Oe œsophagus S.gl, salivary gland S.r salivary reservoir Cr crop G gizzard St, chylific stomach R rectum Ht heart N.C nerve-cord Uses Of the uses to which Cockroaches have been put we have little to say. They constitute a popular remedy for dropsy in Russia, and both cockroach-tea and cockroach-pills are known in the medical practice of Philadelphia. Salted Cockroaches are said to have an agreeable flavour which is apparent in certain popular sauces.
Gecko, chasing cockroaches
Egg-capsule of P. orientalis
A external view B opened C end view. The eggs of the Cockroach are laid sixteen together in a large horny capsule. This capsule is oval, with roundish ends, and has a longitudinal serrated ridge, which is uppermost while in position within the body of the female. The capsule is formed by the secretion of a “colleterial” gland, poured out upon the inner surface of a chamber (vulva) into which the oviducts lead. The secretion is at first fluid and white, but hardens and turns brown on exposure to the air. In this way a sort of mould of the vulva is formed, which is hollow, and opens forwards towards the outlet of the common oviduct. Eggs are now passed one by one into the capsule; and as it becomes full, its length is gradually increased by fresh additions, while the first-formed portion begins to protrude from the body of the female. When sixteen eggs have descended, the capsule is closed in front, and after an interval of seven or eight days, is dropped in a warm and sheltered crevice. In Periplaneta orientalis it measures about ·45 in. by ·25 in.
Common Cockroach
(Blatta orientalis). a, female; b, male; c, side view of female; d, young. After Marlatt, Entom. Bull. 4, U.S. Dept. Agric. The young creature is hatched from the egg in a form closely resembling, on the whole, that of its parent, so that the term 'miniature adult' sometimes applied to it, is not inappropriate. The baby cockroach is known by its flattened body, rounded prothorax, and stiff, jointed tail-feelers or cercopods; the baby grasshopper by its strong, elongate hind-legs, adapted, like those of the adult, for vigorous leaping.
Cockroach-hunting wasps
Cockroach-hunting wasps. A, Dolichurus stantoni leading a nymph of Blattella lituricollis to her nest, c. X 4. B, Podium haematogastrum attaching her egg to an Epilampra sp. while on the side of a termite mound that contains the wasp's nest, c. X 1.6. C, Epilampra sp. parasitized by P. haematogastrum showing the wasp's egg attached to the right fore coxa, c. X 3.2.
Cockroach (Roach)
Cockroach
A female cockroach, Periplaneta, with the dorsal exoskeleton removed, dissected to show the viscera. 1 Head 2 labrum 3 antenna, cut short 4 eye 5 crop 6 nervous system of crop 7 gizzard 8 hepatic caeca 9 mid-gut or mesenteron 10 Malpighian tubules 11 colon 12 rectum 13 salivary glands 14 salivary receptacle 15 brain 16 ventral nerve cord with ganglia 17 ovary 18 spermatheca 19 oviduct 20 genital pouch, in which the egg-cocoon is found 21 colleterial glands 22 anal cercus (From Latter.
Cockroach
Periplaneta orientalis, male. Side view. 1 Antenna 2 head 3 prothorax 4 anterior wing 5 soft skin between terga and sterna 6 sixth abdominal tergum 7 split portion of tenth abdominal tergum 8 cercianales 9 styles 10 coxa of third leg 11 trochanter 12 femur 13 tibia 14 tarsus 15,claws (From Kükenthal.)
Cockroach
Periplaneta orientalis, male Dorsal view. 1 Antenna 2 palp of first maxilla 3 prothorax 4 anterior wings 5 femur of second leg 6 tibia 7 tarsus 8 cerci anales 9 styles (From Kükenthal.)