THE TUMBLING FLOWER BEETLES. 1309 



separating the genera and species is the number and form of the 

 small black ridges on the outer face of the hind tibia 1 and tarsi. The 

 insects should be mounted with the hind legs straightened out and 

 plainly visible, else their identification is impossible. 



KEY TO INDIANA GENERA OF MOROELLID.E. 



a. Abdomen not prolonged at tip ; tarsal claws not cleft ; upper surface of 

 body very finely and transversely strigose. 



b. Front and middle tarsi with third and fourth joints equal ; antenna? 



rather short, with the last five joints broader. I. PENTAHIA. 



l>l). Front and middle tarsi with the fourth joint very small. 



II. ANASPIS. 



an. Abdomen with the last segment prolonged, conical; tarsal claws cleft 

 and pectinate: hind femora much enlarged. 



c. Hind tibia? with only a small subapical ridge; eyes finely granulated. 

 (1. Anal style short, obtuse; scutellum usually emarginate behind; 



eyes not reaching the occiput. III. TOMOXIA. 



dil. Anal style long and slender; scutellum triangular; eyes reaching 



the occiput. IV. MORDELLA. 



cc. Hind tibia- and tarsi with oblique ridges on the outer face; eyes 



coarsely granulated. 



<: Hind tibia' with one long ridge and no subapieal one (Fig. 570, No. 



10) ; length I'i-S mm. V. GLII-ODKS. 



ft 1 . Hind tibi;r with subapical ridge distinct and usually one or more 



oblique ours in addition (Fig. 57<!, Nos. 15 and 17) ; length less 



than <; nun. VI. MORDELLISTENA. 



I. FENTARIA Mills. 1856. (Or., "five i thin.") 



Our species of this and 1 1m next genus are small yellow or yellow 

 and black, finely pubescent forms, having the body fusiform rather 

 than wedge-shaped; hind femora not or but slightly dilated; last 

 dorsal segment not prolonged: eyes oval, narrowly emarginate. 

 Pentaria has the sixth ventral segment visible, and is represented in 

 the State by one of the four known species. 



2418 (77G1). PENTARIA TRIFASCIATA Melsh.. 1'roc. I'hil. Acad. Nat. Sci.. II, 



1845, 31G. 



Elongate, subdepressed. Head, thorax, legs and base of antemue dull 

 reddish-yellow; elytra yellow, with base, tips and a broad band just behind 

 the middle, black ; abdomen, and sometimes the entire under surface, fus- 

 cous. Length 3^1 mm. 



Throughout the State, frequent ; more so in the southern coun- 

 ties. June 4 July 30. Occurs on flowers, especially those of the 

 dogwood (Conius), wild hydrangea and black haw. The thorax is 

 sometimes marked with fuscous and the bands of elytra are rarely 

 connected along the suture. 



