HETEROMEROUS BARK-BEETLES. 



117 



froy, a word vrliicli means Jlamc col- 

 ored, and which was obviously sug- 

 g:ested by the prevalence of red or 

 yellow in their coloration ; some of 

 T tiie foreign species bein<? almost 

 wholly red. An example of the lar- 

 va- is exhibited in the accompanying 

 figure of the larva of Dendroides. 

 These larva- are found under the bark 



UEM.iioiiii..s<ANAnF.Nsis,L:itr.:—<7, larva; /', pu- r. ,i„„„^^,i frp<i*j Mild stiimnv; illld 

 pa: c, beetle (IVmale); d, enlarged anal honm; <!, Ot aecayeu trCLS <UUl SUimp^, <lliu 



Helrater'un:?^ are supposed to be li-;nivorous. 



The following are the three principal genera : 



A. Antenna,' flabellate or pectinate. 



B. Eyes very large, neai'ly coutijjiious Denpiioikks, 4 sp. 



15. B. Kyes imxlerate and distant PiuociiuoA, 2. 



A. A. Antenna", simple rEUii.US, 14. 



The Fyrochroa faheUata, Fab., is from five to six-tenths of an inch 

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

 sides. The hea«l and thorax are yellow, and the elytra blue-black. 

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

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

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

 of which the larviv reside. The autennte are flabellate in the males, 

 and pectinate in the females. The species of Pedilus are mostly lu'tween 

 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. lUllPlPlIOlUD.E. i 



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 th(»y difter 

 from all the other Trachelides except the Mordellidre, with which they 

 are united by some authors. But the ditt'erent habits of the larv;e con- 

 firm the i»ro[>riety of their separation. The perfect insects are found on 

 liowers. The larvoe 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 XI.VllI. STYLOPIDJC. 



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 haxe been described, two of which have been found in JS. 



