. Sanitary entomology; the entomology of disease, hygiene and sanitation. l, distended with blood. Greatlyenlarged. (Marlatt.) The life cycle in Cirnex hemipterus and C. lectularius has been dem-onstrated by Patton. The parasites are ingested by the bug, enclosed inthe large cells or leucocytes, and develop into fully flagellated formswithout reference to the temperature of the external air. The sizeincreases from 4 to 7 micra and vacuolation of the cytoplasm occurs onor after the second day. The single parasite may proceed directly toflagellation, by the appearance of an area stained bright p
. Sanitary entomology; the entomology of disease, hygiene and sanitation. l, distended with blood. Greatlyenlarged. (Marlatt.) The life cycle in Cirnex hemipterus and C. lectularius has been dem-onstrated by Patton. The parasites are ingested by the bug, enclosed inthe large cells or leucocytes, and develop into fully flagellated formswithout reference to the temperature of the external air. The sizeincreases from 4 to 7 micra and vacuolation of the cytoplasm occurs onor after the second day. The single parasite may proceed directly toflagellation, by the appearance of an area stained bright pink by Giemsasolution and called the flagellar vacuole. This vacuole which has a darkcenter rapidly increases in size up to 1 to 3 micra and, passing to thesurface, sends out a pink brush which forms the flagellum by merelygrowing longer. Tlie flagellate form has a dark blue, granular cytoplasmwith a circular trophonucleus which stains deeply in the center; and akinetonucleus hing across the long diameter and situated near the THE BEDBUG AND OTHER BLOODSUCKING BUGS 397. Fig. 76.—Bedbug: Adult before engorgement. Much enlarged. (Marlatt.)
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbenefic, bookyear1921
