828 



FAMILY XI,. LAMPYRIDJE 



sometimes extending nearly their full length, rarely wholly lacking; base 

 of femora and greater part of abdomen yellow. Sides of thorax narrowly 

 margined. Length 8-11 mm. 



Throughout the State, common in the southern counties ; much 

 less so in the northern portion. June 3-July 28. Occurs by 

 thousands on the flowers of the linden; also abundant on those of 

 wild hydrangea, Jersey tea and other shrubs. 



Tribe III. TELEPHORINI. 



Head but slightly prolonged before the eyes ; maxillae moderate 

 in size, their palpi rather long and of variable form; front coxae 

 contiguous ; presternum distinct in front of coxae ; middle coxae con- 

 tiguous; mesosternum horn-like in texture. Eight of the nine 

 recognized genera, are known to be represented in the State. 



KEY TO INDIANA GENERA OF TELEPHORINI. 



a. Elytra entirely covering the wings. 



1). Thorax truncate in front; head entirely exposed; gular sutures con- 

 fluent. XVIII. PODABRUS. 



Thorax rounded in front; head partly covered; gular sutures sep- 

 arate. 



c. Last joint of maxillary palpi dilated, hatchet-shaped. 

 d. Hind angles of thorax of male notched ; head short and broad. 



XIX. Silis. 



(Id. Hind angles of thorax rounded. 



e. Head moderately long ; sides of thorax not notched. 



XX. Telephorfs. 



ee. Head short and broad; sides of thorax in male nicked at the 

 middle. XXI. Polemifs. 



cc. Last joint of maxillary palpi suboval, obliquely truncate; sides of 

 thorax in male distinctly notched at the middle and behind ; an- 

 tennae strongly serrate. XXII. Ditemnus. 

 ad. Elytra abbreviated; wings exposed; gular sutures confluent. 



f. Maxillary palpi with the last joint elongate, hatchet-shaped; side 

 pieces of metathorax wide in front, strongly triangular ; claws with 

 broad tooth near base. XXIII. Trypherfs. 



ff. Maxillary palpi with the last joint oval, pointed ; side pieces of meta- 

 thorax narrow ; claws simple. 

 ff. Mandibles toothed ; head wide, narrowed behind. 



XXIV. Maltiiinfs. 



fffj. Mandibles simple ; head not narrowed behind. 



XXV. Malthodes. 



XVIII Podabrus Fisch. 1839. (Or., "foot + delicate. ") 



Head prolonged and narrowed behind the eyes, so as to form a 

 distinct neck which is not covered by the thorax ; the latter nearly 



