THE PIKE-COLORED BEETLES. 1347 



long, comb-like processes in the male. The name is from that of 

 the typical genus Pijrockroa, meaning "fire + color," and was prob- 

 ably suggested by the presence of red or yellow in their coloration, 

 some of the foreign ones being almost wholly red. Our species live 

 in all stages iinder the half decayed bark of trees and have little 

 economic importance. 



In addition to the more prominent characters mentioned, the 

 Pyrochroida; have the eyes emarginate, rather coarsely granulate 

 and sometimes very large ; antennas 11-jointed, inserted at the sides 

 of the front just before the eyes ; elytra wider than the abdomen, 

 rounded at tips, the epipleura? visible only near the base; abdomen 

 with five free ventral segments, the fifth emarginate, exposing the 

 tip of sixth in male ; front coxte large, conical, contiguous, the cavi- 

 ties widely open behind; middle coxse with distinct trochantins; 

 tarsi with next to last joint dilated, claws simple. 



The principal papers treating of the North American species 

 are as follows: 



LcConte. — "Synopsis of the Pyrochroides of the United States," 

 in Proc. Phil. Acad. Nat. Sci., YU, 1855, 274-275. 



Ilorn. — "Synopsis of Dendroides, " in Trans. Amer. Ent. Soc, 

 XV, 1888, 46-48. 



The 11 known species from North America are divided among 

 four genera, all of which are represented in Indiana. 



KEY TO GENERA OF PYKOCHEOIDyE. 



(7. Eyes moderate in size, well separated. 



6. Antemife simple; color dull yellow; thorax and elytra strongly cari- 

 nate. I- Ischalia. 



6/j. Antennse serrate or branched ; the branches more or less rigid. 



c. Last joint of maxillary palpi long, pruning-knife shaped; length 

 13 or more mm. II- Pyeochroa. 



cc. Last joint of maxillary palpi long, oval ; smaller, not over 8 mm. 



III. ScHizoTtrs. 

 (3(7. Eyes very large, sometimes nearly contiguous; branches of male an- 

 tenna? very slender and flexible. IV. Dendroides. 



I. IscHALiA Pasc. (Gr., "dried up.") 



This genus is represented in the eastern United States by a 

 single small species which, on account of its peculiar sculpture, is 

 very different in appearance from any other Indiana beetle. The 

 body covering is much firmer than in other genera of the family 

 and the last joint of the maxillary palpi is large and hatchet-shaped. 



