FIELD BOOK OF INSECTS. 



The larva? and pupae are much like Tenebrio in miniature. 

 Under favorable circumstances, a generation may be 

 completed in five or six weeks and there may be several 

 generations a year. 



We have one species, bifurcus. It occurs, 

 Boletotherus . J lt . 



often in numbers, in woody, bracket fungi, 



such as grow on the sides of trees and stumps. The adults 

 are black or brownish-black. What attracts attention are 

 the horned males (Plate LXXXIV). A related genus, 

 Boletophagus, is found with it, but more often under bark. 

 In it each eye is completely divided and the antennas are 

 1 1 -jointed. There are two species, each not over .3 in. 

 long and black: in corticola the pronotum has numerous 

 tubercles, its margin is scalloped and, in front of the hind 

 angles, deeply notched; in depressus the pronotum is 

 merely coarsely punctured and its sides are evenly rounded. 



Dia peris maculata is also common in hard fungi and 

 under bark. It is about .25 in. long, oval and convex. 

 The head and most of the elytra are reddish, otherwise 

 black. 



The species of CISTELID^: are like those of the Tene- 

 brionidae in general structure, but see the key (p. 380). 

 They have longer, more slender antennae and generally 

 smooth, pubescent surface; they are usually brown in 

 color with no, or only confused, maculation and often 

 taper to a point posteriorly. They are found on leaves, 

 flowers, and under bark, the larvae, so far as known, living 

 in rotten wood and somewhat resembling wire-worms in 

 shape. None are of economic importance. 



Of the LAGRIID/E (see p. 380) there are probably less than 

 a dozen recognized species in the United States and only 

 two genera. These species are black or bronzed, with 

 rather thin, flexible elytra, and are found on flowers, 

 leaves, or under bark of trees. For our purposes, we may 

 say that our species of Arthromacra are about .5 in., and 

 of Statira usually less than .3 in. long. 



384 



