HETEROMEROUS BARK-BEETLES. 



117 



[Fi£- 5^1 froy, a word which means flame col- 



ored^ and which was obviously sug- 

 gested by the prevalence of red or 

 yellow in their coloration ; some of 

 the foreign species being almost 

 wholly red. An example of the lar- 

 va- is exhibited in the accompanying 

 figure of the larva of Dendroides. 

 These larvse are found under the bark 



DENDKOiDEsCANAnENsis, Latr.:— a, larva; 6, pu- ^i? j^„„„ofl frotia •iiwl Kfnnn»« mifl 

 pa; c, beetle (female) ; d, enlarged anal hornsf e, 01 (lecayea trees and SlUmi)S, anu 



f^^!^^^\^^^^,^]^'^^-'f'^^^^^^^'>^^^^-^^'£^- are supposed to be lignivorous. 

 The following are the three principal genera : 



A. Antenna' flabellate or pectinate. 



B. Eyes very large, nearly contiguous Dendroides, 4 sp. 



B. B. Eyes moderate and distant Pyuochroa, 2. 



A. A. Antenniii simple Pedilus, 14. 



The Pyrochroa flabellata, Fab., is from fi^ve to six-tenths of an inch 

 in length, of an elongated and somewhat flattened form with parallel 

 sides. The head and thorax are yellow, and the elytra blue-black. 

 The Benroides canadensis, Latr. (Fig. 54) is somewhat similar but a little 

 smaller and the elytra are of a dull or brownish-black color. Both of 

 these insects are rather common about decayed trees, under the bark 

 of which the larvaj reside. The antenniB are flabellate in the males, 

 and pectinate in the females. The species of Pedilus are mostly between 

 two and three-tenths of an inch in length, and usually exhibit the red- 

 dish thorax and black elytra, so characteristic of the family. 



Family XLVII. RHIPIPHORID.E. 



This is a small family the species of which are distinguished by hav- 

 ing the elytra usually shorter than the abdomen, and somewhat nar- 

 rowed and separated from each other behind, the thorax is narrowed 

 in front, but as wide at base as the elytra, in which they differ 

 frr^m all the other Trachelides except the Mordellidse, with which they 

 are united by some authors. But the different habits of the larvfe con- 

 firm the propriety of their separation. The perfect insects are found on 

 flowers. The larvie are parasitic in the nests of wasps, and a foreign 

 species is known to infest the bodies of cockroaches. 



Twenty-two N. A. species have been described. 



Family XLVIII. STYLOPID^. 



A family of minute insects of so anomalous a character that it is very 



difficult to determine their proper location in the natural system. But 



few species are known, all of which are parasitic in the bodies of bees. 



Five genera have been described, two of which have been found in N. 



