THE LEAF BEETLES. 



1111 



KEY TO INDIANA SPECIES 01 LEMA. 



a. Elytra with the ninth stria entire. 

 1). Elytra wholly dark blue. 



c. Head red, with two tubercles on vertex; antennae, legs and abdo- 

 men black. 2046. brunnicoeets. 

 cc. Head black, without tubercles; thorax red. 2047. collaris. 

 bb. Elytra reddish-yellow, with three black stripes. 2048. trilineata. 

 aa. Elytra with the ninth stria interrupted. 



d, Elytra reddish-yellow, spotted with black. 



e. Larger, 6 mm. ; spots on the disk of elytra. 6-punctata. 

 cc. Smaller, 4.5-5 mm. ; spots common, crossing the suture. 



2049. ALBINI. 



aa. Elytra blue ; thorax red, with a central black spot. 2050. sayi. 



2046 (6565). Lema brunnicollis Lac, Mom, I, 1801, 3S2. 

 Elongate-oblong. Head, thorax and under surface, except abdomen. 



red; color of other parts given in key. Thorax very finely punctulate, with 

 a few coarse punctures on sides near apex and on median line. Length 

 4-4.5 mm. 



Lake, Steuben and Marshall counties; rare. June 12-June 27. 

 Taken by sweeping herbage in tamarack swamp. Crotch records it 

 from the Southern States, so that it probably occurs throughout In- 

 diana. 



2047 ( 6567). Lema coeearis Say. Journ. Phil. Acad. Nat. Sci., III. 1823. 



430; ibid. II, 203. 



Elongate-oblong. Black ; thorax red ; elytra dark greenish-blue. An- 

 tennae shorter than in the preceding,; vertex with a median groove. Tho- 

 rax short, very finely and sparsely punctate. Length 4.5-5 mm. 



Throughout the State; frequent. May 11 -July 1. Occurs es- 

 pecially cn the spiderwort. Tradescantia virginiana L; also on other 

 low herbs in moist, sandy localities. 



2048 (6573). Lema trilineata Oliv.. Ent., VI. 1808. 739. 

 Elongate-oblong, robust for the genus. Reddish-yellow ; 



elytra somewhat paler, with sutural margin and rather wide 

 stripe on sides black; antenna? (except basal joints), tips 

 of tibiae and tarsi, blackish. Thorax usually with two black 

 spots on disk, strongly constricted at middle, smooth except 

 a few coarse punctures on sides near apex. Inner rows of 

 elytra 1 punctures indistinct on apical half. Length 6-7 mm. 

 (Eig. 479.) 



Throughout the State; frequent. April 19- July 25. Occurs on 

 the foliage of various Solanaceous herbs, especially that of potato. 

 Sometimes called the "old-fashioned potato beetle/' but that name 

 in Indiana is usually applied to "blister beetles" of the genus Epi- 

 cauta. Mating June 8. 



2049 (6575b). Lema albina Lac, Mom, I, 1845. 492. 

 Elongate-oblong. Reddish-yellow; antennas, legs (except base of fe- 

 mora) and sides of meta sternum, blackish; elytra with a small spot on 



