THE PLEASING FUNGUS BEETLES. 541 



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

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

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

 seven genera, have been taken in Indiana. 



KEY TO TEIBES OF NORTH AMEKICAN EROTYLID^. 



(/. Front Cdxal euvities opeu behind; epimera of metathorax not distinct; 

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

 gradually formed, .:.- or O-jointed. Tribe I. Laxgubini, p. 541. 



ua. Front coxal cavities entire; epimera (if metathorax separated from the 

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

 tennal club 3- or 4-jointed. more abruptly formed. 



Tribe II. Erottlini. p. ."4;j. 



Tribe I. LAXGURIXI. 

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



I. LANGUKL4 Latr. 1802. (L., "a kind of lizard.") 



Long, narrow insects, somewhat resembling certain click beetles 

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

 occur upon the leaves and stems of plants, especially Mesadenia. 

 Lactuca and other genera of Composita?. and upon the flowers of 

 Umbelliferae. Several of the 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 INDIAXA SPECIES OF LANGUEIA. 



a. Abdomen in great part red. 

 6. Head red. 



r. Antennal club distinctly G-jointed ; under side red, the last ventral 

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



1031. BICOLOE. 



cc. Antennal club 5-jointed ; last tliree ventral segments black. 



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



dd. Thorax alutaceous, or «-ith a greasy aspect, its disli with a large 

 elongate black blotch. discoidea. 



66. Head either entirely or in great part black. 

 e. Antennaj wholly black. 



/. Mclastcrnnm blue; e]ii]ilc'nra and sides of elytra at middle red. 



1033. anoustat.a.. 

 ff. Metastcrnuiii red; knees, tarsi and tips of tibi« black. 



var. uiiLERii. 

 re. .\ntenna' in |iai-( i-eddis]i-.\e]low ; elytra willi ri hriiad median red- 

 disji ci-ossbar. 10;!1. timfasciaia. 



ua. Abdomen entirely black. 



