THE LADY BEETLES. 



513 



lady-bug, Coccinella 9-noiata, .common in gardens. Most of {lie 

 species resemble these common forms in size and shape, being 

 rounded and convex. The tribe, as divided by Casey, comprises 

 ten North American genera. In order to avoid the division into so 

 many groups I have followed Leng by including the single genus 

 Psyllobora of the tribe PsyllobOrini and combining certain genera 

 with Coccinella. This gives in our fauna representatives of five 

 genera. 



KEY TO INDIANA GENERA OF COCCINELLINI. 



a. Body larger. 4-7.5 mm. ; antennae shorter with last joint truncate, 

 ft. Antennae only slightly longer than head; epipleura not extending to 

 the sutural tip. 



c. Body usually rounded, strongly convex; elytra reddish, without 

 ^pots or with more than two black spots on each; tarsal claws 

 with a large subquadrate tooth at base. (Fig. 1S4, c.) 



IT. Coccinella. 



cc. Body oval, less convex ; elytra reddish with one or two black spots 

 on each ; tarsal claws as in Fig. 1S4, b. V. Adalia. 



6ft. Antenna longer, extending at least to middle of thorax; epipleura 

 entire. 



cl. Tarsal claws bifid (Fig. 184. a) ; prosternal process compressed in 

 front: elytra without spots. YL Neomysia. 



(Id. Tarsal claws as in Coccinella ; prosternal process broad, strongly 

 convex in a transverse direction and prominent at apex; elytra 

 with numerous spots. VII. Anatis. 



aa. Body small. 2-2.5 mm. : antennae slender with last joint elongate. 



VIII. Psyllobora. 



IV. Coccinella Linn. 1758. (G-r., "scarlet + insect. ") 



Rounded, very convex forms having the front margin of the tho- 

 rax more or less emarginate. They vary considerably in the black 

 markings of thorax and elytra, and among them are some of the 

 most common and best known of the "lady-bugs." The genus, as 

 usually denned, was divided by Casey into four. viz.. Coccinella, 

 Xcoharmonia. Cycloneda and Olla, and to them he ascribed 27 

 species. Leng reunited the four and reduced the number of species 

 to 12. Of these the following are known from the State : 



KEY TO INDIANA SPECIES OF COCCINELLA. 



a. Thorax black with narrow apical margin and a large subquadrate spot 

 at each apical angle, pale. 

 &. Elytra together normally with nine spots, without trace of sub-basal 



CT0SSbar - 978. 9- NOT AT A. 



65. Elytra with three black crossbars, the one near base common, the 

 others interrupted at suture. 979. tkifasciata. 



