170 



THE ORDER OF COLEOPTERA. 



Fab., three-twentieths of an inch long. A much smaller species, the 

 G. dispar, Lacord., has been placed in the sub-genus Exema. Bahia, 

 Cliev., is founded upon the B. biguttata, Oliv., and its varieties. It is 

 about three twentieths of an inch long, blue-black, with a fulvous spot 

 on the shoulder, and another at the tip of each elytra. It differs from 

 the great majority of Cryptocephalides in having the tip of the abdo- 

 men but slightly, and in many specimens not at all exposed. Saxinis 

 omogera, Lacord., resembles the last mentioned insect in size and color, 

 except that there is no spot at the end of the elytra. It is found in the 

 Southern States and Texas. The genus contains but one other Xorth 

 American species. The type of the genus Goscinoptera., Lacord., is the 

 G. dommicana, Fab. (Fig. 82), two-tenths of an inch long, or a little more, 

 black, rather densely covered with a fine ash-colored pubescence. Several 

 other species have been founa in the remote Western States. The C. 

 vittigera., LeC, found in Kansas, is more oblong, and each elytra has a 

 fulvous stripe, which is bent up like a hook at the end. The generic 

 name comes from kosMnos — a sieve, andptera — wings, referring to the 

 irregularly distributed punctures, somewhat like the holes in a sieve. 

 The genus Gryptoceplialus contains many more species than all the 

 others combined. It has been divided into a considerable number of 

 sub-genera, mostly upon slight or obscure characters. A more conve- 

 nient distribution, for the purpose of identification of species, could be 

 made in accordance with their colors. The majority are brown, with 

 yellow stripes or spots j a considerable number are blue-black, with ru- 

 fous or orange spots ; and some of the smallest species are wholly blue- 

 black or brown. 



[Fig. 83.J 



[Fig. 84.J 



Sub-family GALERTJCIDES. 



Named after the genus Galeruca, 



of Geoffroy. They are distinguished 



primarily from the other Chrysome- 



lidte by the approximation of the 



antennae at their jjoints of insertion, 

 (DiAUKOTicAt being rarely farther apart than the 

 The'^^stiiped length of the first joint, and from 

 cucum^ier-^^ the Chrysomelidcs proper by having 

 the antennai perfectly filiform, or not enlarged 

 towards the tip. The thorax is narrower than 

 the elytra, which, together with a similarity 

 of coloring, gives to some of the species a 

 strong resemblance to the Criocerides, but 

 they can always be distinguished by the tho- 

 rax having a distinct lateral margin or edge. K^Tifrf^u^f of fh^ fl,u; 



I 



1 



h 



I 



DiABROTICA VITTATA : — Larva 



It is in this sub-family that we find a large ^dT^e^-ffter Eiiey 



arvse ; 1, back view; 2, 



