THE TUMBLING FLOWER BEETLES. 1311 



KEY TO INDIANA SPECIES OF TOMOXIA. 



a. Last joint of maxillary palpi long, triangular; scutelluin emarginate be- 

 hind. 2421. BIDENTATA. 



ua. Last joint of maxillary palpi broadly hatchet-shaped: scutelluin tri- 

 angular. 2422. HUBRIS. 



2421 (7773). TOMOXTA BIDKNTATA Say. Journ. Phil. Acad. Nat. Sci., Ill, 



1824, 277 ; ibid. II. 164. 



Robust, wedge-shaped. Brown, varied with ash-gray pubescence as fol- 

 lows: four stripes on thorax radiating from the middle of front margin, 

 which, with the side margins, is also ash-gray; elytra each with three or 

 four stripes on basal half, a broken crossband behind middle and the apex 

 ash-gray; a large rhomboidal brown spot on each near base. Length 10- 

 13 mm. 



Lake, Vigo and Posey counties ; scarce. February 6-June 7. 

 Occurs on dead tre&s. T. lincclln Lee., 5-7 mm. in length, the elytra 

 marked with narrow ash-gray lines, is now recognized as the male of 

 bidentata. 



2422 (7776). TOMOXIA HII.ARIS Say, Bost. Journ. Nat. Hist, I, 1835, 190; 



ibid. II, 661. 



Form wedge-shaped; more slender than Wdcntatu. Black, varied with 

 ash-gray pubescence; elytra with a narrow sub-basal band of brownish- 

 yellow pubescence and a broader one behind the middle, the two connected 

 along the suture and margined with ash-gray pubescence. Length 9-13 mm. 



Described from Indiana. Two in Stein collection, probably from 

 Posey County. 



IV. MORDELLA. Linn. 1758. (L., "bite.") 



Rather large wedge-shaped forms having the scutellum triangu- 

 lar; anal style usually long and slender; last joint of maxillary palpi 

 long, triangular and obliquely truncate (except in the male of ocu- 

 Ia1a). Nine of the 19 recognized forms have been taken in the 

 State, while two others may occur. 



KEY TO INDIANA SPECIES OF MOKDELLA. 



(i. Anal style short and truncate; dull black; thorax and elytra sprinkled 

 with small spots of silvery pubescence, the latter with narrow inter- 

 rupted band on apical third composed of confluent spots. BOREALIS. 

 IKI. Anal style long and slender. 



/(. Last joint of maxillary palpi triangular, the sides unequal. 



c. Elytra dark, without conspicuous markings. 

 [8323402] 



