SI 6 FAMITjY XI.. ].A?,IPYKID.E. 



Putiuiiii ;iii(] (Jihsoii ('(Unities; \-,\n\ -Inly 4-Septcinber 1. 

 Beaten from Howers of the liiuleii. Tllla (imericana L. 



Subfamily II. LAMPYRINAE. 



Tlie iiieiiihei's of tliis siiUfamily hav(^ tlie middle eo.xtie contiguous 

 and the epipleura? wide at the base of elytra. They are divided 

 into two tribes, both represented, in the State. 



KEY TO TRIRES OF L.VMl'VRIN.E. 



(t. Head more or less concealed beneath tlie thora.x; antennm usually ap- 

 proximate at base; epimera of nietatliorax long. 



Trllie I. Lampykini, p. 816. 



flffi. Head e.xposed ; antenna:' widely separated at base; epimera of metatho- 



rax wide. Tribe II. Phengodini. p. S24. 



Tribe I. LAMrYKINI. 



To this tri])e belono' our tnie fireflies, most genera possessing a 

 light-giYing api)aratns on the hind a])dominal segments. The head 

 is deepl.N' innnersed in the tliorax. the edges of which are usually 

 expanded into a wide, thin margin. The tribe is separated into 

 twelve genera, representatives of eight of which have been taken in 

 Indiana. 



KEY TO 1NDI.\NA GENERA OF LAMPYRINI. 



<i. Antemue with second joint small, usually transverse; head completely 

 covered by thorax. 

 h. Antenniie bipectinate, somewhat distant at base, last joint simple; 

 niarsins of thorax not flattened. VI. Polyclasis. 



hi). Antenn;e not pectinate, approximate at base. 

 r. Last joint of antennae elongate, simple. 

 (1. Eyes small ; light organs feeble ; ventral segments without stigma- 

 like pores. 

 c. Antennfo very nmch compressed, not serrate; second joint very 

 short, transverse. VII. Licidota. 



re. Antenna! with second joint one-half as long as third, or near- 

 ly so. 

 /. Last dorsal si^gnient of male rounded; light organs wanting. 



VIII. Elly'ciinia. 

 /'/'. L:ist dorsal segment of ni;ile liisinuate and truncate. 



IX. Pyropyga. 



(1(1. Eyes large, but larger in male than female; light organs well 



developed; male with strongly marked stigma-like pores. 



//. Thorax subcarin;ite ; fcinalc willi liglit organs on the sides of 



abdomen. X. Pyractomena. 



g<i. Thora.K not carinate. frequently grooved; female with light 



orgniis on llie middle of nlxlomen. XI. Photinus. 



