304 Phylum Arthropoda 



were found to lie side by side, frequently stuck together in a compact 

 row. In such cases they could be removed in a group. 



Incubation. When first laid the eggs are opaque, pearly white or 

 with an amber tint. They soon darken, take on a pink coloration, and 

 become deep red prior to hatching. The incubation chambers consisted 

 of glass tubes similar to those used for rearing, into the bottom of which 

 had been poured a small quantity of plaster of Paris, and closed with 

 cork or moist cotton stoppers. In these observation of hatching was as 

 possible without removal of the stoppers. 



The length of the egg stage was largely dependent on prevailing tem- 

 peratures, and the eggs hatched under a surprising range of moisture 

 conditions. Eggs placed in dry containers with cotton plugs became 

 shriveled in a few hours, and remained pale yellow for a number of 

 days. A large percentage eventually hatched, requiring, however, a 

 somewhat longer time to do so than those which were kept moist. Eggs 

 which were kept for long periods in closed containers with moisture 

 present, likewise remained viable until hatching. The emerging nymphs, 

 however, floundered in the water film present, and soon perished. 



Bibliography 



Janes, Melvin J. 1935. Oviposition studies on the chinch bug, Blissus leucopterus 



Say. Ann. Ent. Soc. Amer. 28:109. 

 Luginbill, Philip. 1922. Bionomics of the chinch bug. U. S. D. A. Bull. 1016. 

 Shelford, V. E. 1932. An experimental and observational study of the chinch bug 



in relation to climate and weather. ///. Nat. Hist. Surv. Bull. 19:487. 



Family reduviidae 



J 



REDUVIUS PERSONATUS* 



A DULTS of Reduvius personatus, collected at a light trap and paired, 

 l\ were confined in small cartons and were fed daily on houseflies 

 which had been caught in a net and disabled before being introduced into 

 the cages. Eggs were removed daily and placed in a salve box, % of an 

 inch high by 1% inches in diameter. It was found desirable to line the 

 box with a tightly fitting wad of heavy, unglazed paper, which served to 

 give the bugs a foothold and also to absorb excess moisture from food and 

 excrement. Later, in work involving humidity, % inch holes were 

 punched in the lids, and these openings covered with coarse silk bolting 

 cloth, so that the atmosphere could come into equilibrium readily with 

 that of the rearing cabinet. 



The nymphs also were fed houseflies since there was a large supply 



♦Abstracted from an article in Ann. Ent. Soc. Amer. 24:19, 1931, by Philip A. Readio, 

 Cornell University. 



