﻿OF THE STATE ENTOMOLOGIST. 21 



cially in very hot seasons. More rarely the short-winged type occurs 

 ■in a different locality from the long-winged type, and usually in that 

 case in- a more northerly locality. We have a good illustration of this 

 latter peculiarity in the case of the Chinch Bug, for a dimorphous 

 short-winged form occurs in Canada, and Dr. Fitch describes it from 

 specimens received from the States, as a variety, under the name of 

 ■o.pierusP 



DESCRIPTIVE. 

 MiCROrcs Leucopterus (Say.)— £;<75f— Average length 0.03 inch, elongate-oval, 

 the diameter scarcely 1-5 the length. The top squarely docked and surmounted with 

 four small rounded tubercles near the center. Color, when newly laid, pale or whitish, 

 and translucent, acquiring with age an amber color, and finally showing the red parts 

 of the embryo, and especially the eyes toward tubercled«nd. The size increases some- 

 what after deposition, and will sometimes reach near 0.04 inch in length.* 



Larval Stages.— The newly hatched larva is pale yellow, with simply an orange 

 ■stain on the middle of the three larger abdominal joints. The form scarcely differs 

 from that of the mature bug, being but slightly more elongate; but the tarsi have but 

 two joints (Fig. 4, d^) and the head is relatively broader and more rounded, while the 

 joints of body are sub-equal, the prothoracic joint being but slightly longer than any 

 of the rest. The red color soon pervades the whole body, except the first two abdomi- 

 nal joints, which remain yellowish, and the members, which remain pale. After the 

 first molt the red is quite bright vermillion, contrasting strongly with the pale band 

 across the middle of the bodj', the prothoracic joint is relatively longer, and the meta- 

 thoracic shorter. The head and prothorax are dusky and coriaceous, and two broad 

 marks on mesothorax, two smaller ones on metathorax, two on the fourth and fifth 

 abdominal sutures, and gne at tip of abdomen are generally visible, but sometimes obso_ 

 lete ; the third and fourth joints of antennae are dusky, but the legs still pale. After 

 ihe second molt the head and thorax are quite dusky, and the abdomen duller red, but 

 the pale transverse band is still distinct ; the wing-pads become apparent, the members 

 -are more dusky, there is a dark red shade on the fourth and fifth abdominal joint, and, 

 ventrally, a distinct circular dusky spot covering the last three joints. 



Pupa — In the pupa all the coriaceous parts are brown-black, the wing-pads extend 

 almost across the two pale abdominal joints which are now more dingj*, while the gen- 

 eral color of the abdomen is dingj'^ gray ; the body above is slightly pubescent, the 

 members are colored as in the mature bug, the three-jointed tai'sus is foreshadowed, and 

 the dark horny spots at tip of abdomen, both above and below, are larger. 



Imago — The perfect insect has been well described, and I will append the original 

 descriptions : 



Lyg.eus Lencopterus (chinch bug). Blackish, hemelytra white with a black spot. 



Inhabits Virginia. 



Body long, blackish, with numerous hairs. Antennae, rather short hairs; second 

 joint yellowish, longer than the third; ultimate joint rather longer than the second, 

 thickest; tliorax tinged with cinereous before, with the basal edge piceous; hemelytra 

 white, with a blackish oval spot on the lateral middle ; rostrum and feet honey yellow ; 

 thiglis a little dilated. 



Length less ihan three-twentieths of an inch. 



1 took a single specimen on the eastern shore of Virginia. 



The whiteness of the hemelytra, in which is a blackish spot strongly contrasted, 

 distinguishes this species readily— [Say, Am. Entomology, I, p. 829. 



"•This last is the length given by Dr. Shimerr The stricture on this measurement iu my 2(i 

 Report (p. 22,) first appeared in the American Entomologist, in an editorial prepared principally by 

 Mr. "Walsh, and was made without having measured the egg. 



