]316 FAMILY LXT. — MORDELLID.Ti;. 



KEY TO GEOUPS OF INDIANA MOKDELLISTENA. 



a. Hind tibiifi and first joint of liind tui-si eacli with a singte short, oblique 

 ridge near tip. (Fig. .^TO, Xo. 15.) Group A. 



an. Hind tibise with two or more ohlique ridges on outer face. 

 1). Hind tiblse with but two oblique ridges on outer face. 



c. Ridges of tiblio converging above. (Fig. 57G, Xo. 17.) Group B. 

 fc. Ridges of tibire parallel. 



.7. Ridges equal in length. (Fig. 577, a.) Group ('. 



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

 face of the tibite. (Fig. 57S, ti.) Group D. 



hi). Hind tibia? with three or more short, oblique parallel ridges. 



c. Hind til)ia' with but three ridges. (Fig. 570, h.) Group E. 



vc. Hind tibi.-c with four or more ridges. (Fig. 580, «.) Group />'. 



Geoxjp a. 



This group is represented in the collection hy two species. 



24:13 (7795). MOKDELLISTENA BiciNCTELLA Lec. Proc. Phil. Acad. Nat. Sci., 

 XIV, 1862, 48. 

 P)()d,v narrow, parallel. Pilack; elytra with two yellow bauds, flret near 

 base and Interrupted I),v suture, second one fourth from tips; head, antenn.i! 

 and legs, except hind femora, dull yellow: thorax stiraetimes black, some- 

 times brick red. Length 2-2.5 mm. (Fig. 57(>, Xo. 10.) 



Steuben and ]\larshall counties; scarce. June 11-July 6. 



24^4 ( ). MOKDELLISTENA CONFISA Sp. UOV. 



"N'ery slender, parallel. Black, sparsely clothed with bro\vnish pubes- 

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

 and abdominal process dull brownish-yellow. I^ength 2.5 mm. 



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

 but much more slender and with but one rido-c on tibine and first 

 ta,rsal. 



Gboup B. 



This group contains two uniform brownish-yellow species hav- 

 ing the tibial ridges not parallel, but conver,<;ing above. 



KEY TO INDIANA SPECIES OF GEOIT n. 



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



of tibisE short, less strongly marked. i;4;!n. i,i'tf..\. 



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



ridges of tiliia» long, very strongly marked. 2430. aeida. 



24.55 (7707). MoRDELLiSTENA Li'TEA ,Melsli., Proc. Phil. Acad. Xat. Sci., TI, 

 184.5, 315. 



Slender, wedge-sha|ied. Uuiforni Iwowuisli-yellow ; elytra densely clothed 

 witli yellow pubescence. I,engtli 2.8-;i.2 nnn. 



liTarion, (h-ange and Posey counties; scarce. June 1-Jnne 9. 



