]31f) FAMILY LXI. MORDELLIIX3L 



KEY TO GROUPS OF INDIANA MOKDELLISTENA. 



u. Hind tibia- and first joint of hind tarsi each with a single short, oblique 

 ridge near tip. (Fig. 576, No. 15.) Group A. 



(HI. Hind tibiie with two or more oblique ridges on outer face. 

 1>. Hind tibia 1 with but two oblique ridges on outer face. 



c. Ridges of tibia 1 converging above. (Fig. 576, No. IT.) Group H. 

 cc. Ridges of tibiae parallel. 



(1. Ridges equal in length. (Fig. 577, a.) Group V. 



(1<1. Ridges unequal, the upper one extending almost across the outer 

 face of the tibia-. (Fig. 578, </.) Group />. 



1>1>. Hind tibia? with three or more short, oblique parallel ridges. 



c. Hind tibi.-e with but three ridges. (Fig. 570, It. ) Group E. 



ee. Hind tibia* with four or more ridges. (Fig. 580, .) Group /'. 



GROUP A. 

 This group is represented in the collection by two species. 



i!4.".:' (7705). MORDELLISTENA BiciNCTELLA Lee., Proc. Phil. Acad. Nat. Sci.. 



XIV, 1862, 48. 



Body narrow, parallel. Black: elytra with two yellow bands, first near 

 base and interrupted by suture, second one fourth from tips; head, antenna 1 

 and legs, except hind femora, dull yellow; thorax sometimes black, sonic- 

 times brick red. Length 2-2.5 mm. (Fig. 576, No. 16.) 



Steuben and Marshall counties; scarce. June 11-July fi. 



1'4.'!4 ( ). MORDELIJSTENA CONFUSA Sp. UOV. 



Very slender, parallel. Black, sparsely clothed with brownish pubes- 

 cence; elytra with an oblong, dull yellow humeral spot; labrum, palpi, tarsi 

 and abdominal process dull brownish-yellow. Length 2.5 mm. 



Martin County; rare. May 16. Resembles liplayiata in color, 

 but much more slender and with but one ridge on tibia 1 and first 



tarsal. 



GROUP B. 



This group contains two uniform brownish-yellow species hav- 

 ing the tibial ridges not parallel, but converging above. 



KEY TO INDIANA SPECIES OF GROUP II. 



a. First joint of hind tarsi with two, second with one oblique ridge; ridges 



of tibia 1 short, less strongly marked. 2435. LUTEA. 



IHI. First joint of hind tarsi with three, second with one oblique ridge; 



ridges of tibia' long, very strongly marked. 24.36. ARIDA. 



2435 (7707). MORDELLTSTKNA LUTEA Melsh., Proc. Phil. Acad. Nat. Sci., II, 



1845, 315. 



Slender, wedge-shaped. Uniform brownish-yellow ; elytra densely clothed 

 with yellow pubescence. Length 2.8-3.2 mm. 



Marion, Orange and Posey counties; scarce. June 1-June 9. 



