THE PLEASING FUNGUS BEETLES. 541 



Nearly 1,800 species of Erotylidse are known, most of which are 

 exotic and tropical. Only ahout 50 species, distributed among two 

 tribes, are listed from North America. Of these 22, belonging 1 to 

 seven genera, have been taken in Indiana. 



KEY TO TRIBES OF NORTH AMERICAN EROTYLID^. 



*/. Front coxal cavities open behind; epimera of metathorax not distinct; 

 form very elongate, subcylindrical, the sides parallel; antennal club 

 gradually formed, 5- or ('.-.jointed. Tribe I. LANGURINI, p. 541. 



an. Front coxa! cavities entire; epimera of metathorax separated from the 

 episterna by a distinct suture: form more robust, usually oval; an- 

 tennal club .">- or 4-jointed, more abruptly formed. 



Tribe II. EROTYLINI. p. 54:5. 



Tribe I. LAXGURIXI. 



This tribe is represented in North America by the single genus: 



f 



I. LANGURIA Latr. 1802. (L., " a kind of lizard. ") 



Long, narrow insects, somewhat resembling certain click beetles 

 (Elaterida?) in form, and of shining black and red colors. They 

 occur upon the leaves and stems of plants, especially Mesad< n'ni. 

 Lactuca and other genera of Composite 1 , and upon the flowers of 

 Umbellifera\ Several of [he species hibernate as imagoes and in 

 early spring are to be found beneath logs and stones. Fifteen are 

 known from the United Slates; of these six have been taken in In- 

 diana, while two others may occur. 



KEY TO IN11IANA SPECIES OF LANtfl'RI A. 



a. Abdomen in great part red. 

 7;. Head red. 



c. Antennal club distinctly 0-jointed ; under side red. the last ventral 

 segment black; thorax red, usually with a black discoidal spot. 



1031. BICOLOR. 

 cc. Antennal club 5-.iointed ; last three ventral segments black. 



d. Thorax red, shining, without spot. 1032. MOZARDI. 



del. Thorax alutaceous, or with a greasy aspect, its disk with a large 

 elongate black blotch. DISCO IDEA. 



lib. Head either entirely or in great part black. 

 <. Antenna' wholly black. 



/. Metasternum blue; epipleura and sides of elytra at middle red. 



10:;::. AXOTSTATA. 

 //'. Metasterimm red; knees, tarsi and tips of tibia' black. 



var. rm.EKii. 



cc. Antenna* in part reddish-yellow; elytra with a broad median red- 

 dish crossbar. 1<>34. TKIFASCIATA. 

 aa. Abdomen entirely black. 



