1118 



FAMILY LIII. — CHRYSOMELID.L. 



KEY TO INDIANA SPECIES OF BASSAREUS. 



a. Elytra with either spots or stripes. 



1). Elytra each with two or more reddish, black, or yellow spots, 

 c. Spots on each elytron four or more. 

 d. Edge of thoracic flanks, beneath the antennae, acutely toothed. 



2058. CLATHRATUS. 



dd. Edge of thoracic flanks only feebly sinuate. 



e. Elytra black or piceous, the spots yellow. 2059. formosus. 

 ee. Elytra yellow, the spots smaller, black. 



2059a. var. sulphuripennis. 



cc. Elytra each with two reddish spots. 

 f. Thorax uniform dull red, elytra darker. detritus. 

 //. Thorax black, sometimes, with yellow spots. 



g. Elytra without a basal row of small, oblong, pale spots. 



2060. SELLATUS. 



gg. Elytra with a basal row of small, oblong yellow spots, the 

 outer two connected with the larger discal spot. 



2061. MAMMIFER. 



bh. Elytra with black and yellow stripes or with a single yellow spot 

 near apex. 



h. Thorax in part or wholly black; upper surface dull. 



i. Elytra with discal yellow stripes. 2062. lituratus. 



ii. Elytra without discal stripes. 



j. Thorax and elytra with reddish-yellow margins. 



2062a. var. recurves. 

 jj. Thorax black with two red basal spots; elytra with small 

 apical pale spot. var. castus. 



jjj. Thorax wholly black; elytra as in var. castus. 



2062b. var. nicer. 



hh. Thorax wholly reddish-yellow, sometimes feebly infuscate at mid- 

 dle of disk; surface polished; elytra with two yellow stripes 

 which unite at apex. 2063. lativittis. 



(/(/. Elytra wholly yellow without spots or stripes. 



2061a. var. luteipennis. 



205S (6606). Bassareus clathratus Melsh.. Proc. Phil. Acad. Nat. Sci.. 

 Ill, 1847. 173. 



Short, robust, subcylindrical. Head and tho- 

 rax dull red, each with paler yellow spots, those on 

 thorax near front and hind angles (often confluent) 

 and two larger oblique basal ones ; elytra blackish 

 or pieeous-brown. each with apex and three cross- 

 rows of spots, yellow, the spots in basal row elon- 

 gate, the others irregular or subquadrate; femora 

 and base of antenna? red ; apical half of antenna?, 

 tibia^ and tarsi blackish. Thorax finely and sparse- 

 ly punctate. Elytra with rows of coarse, deep punc- 

 tures, the fifth and sixth rows much confused near 

 middle; alternate intervals wider and more convex. Length 3.8-5 mm. 

 (Fig. 483.) 



