414 COLEOPTERA OF NORTH AMERICA. 



Legs rather long; anterior coxag large, conical, contiguous; 

 middle coxee conical, contiguous, with distinct trochantin; 

 hind coxie oblique, transverse, slightly separated; tibial 

 spurs small; anterior and middle tarsi 5-jointed; hind tarsi 

 4-jointed; the penultimate joint is dilated and somewhat 

 prolonged beneath ; the claws are simple. 



A few insects, from one-third to three-fourths of an inch long;, 

 are comprised in this family; our species live under bark, nnd 

 several are conspicuous for the rufous thorax, which contrasts 

 with the black head and elytra. 



The genera are four from the Atlantic States, of which Deu- 

 droides is also represented in Alaska: — 



Eyes moderate in size, distant ; 



Antennae simple. Ischalia. 

 Antennae serrate or ramose ; 



Last joint of maxillary palpi long, cnltriform. Pyrochroa. 



Last joint of maxillary i^alpi long, oval. Schizotus. 



Eyes very large, sometimes nearly contiguous. Dendroides. 



The branches of the male antennse are rigid in Pyrochroa, and 

 very slender and flexible in Dendroides; in Schizotus they are of 

 an intermediate form, and somewhat flexible. 



Ischalia is represented by a very remarkable insect, I. costala 

 Lee, from the Southern States. It is of a testaceous color (.2 unc. 

 long), with the head black, the front retuse; the thorax is serai- 

 circular, with the sides thickened and refle.xed, and the middle 

 strongly carinate; this carina is prolonged into a point at the 

 base. The elytra are elongate oval, very coarsely punctured, 

 flattened on the back, with a very strong ridge running from the 

 humerus nearly to the tip, and another very near the margin 

 from near the base to the tip itself, thus causing the appearance 

 of distinct epipleurae; the elytra are dusky, with a long lateral 

 spot and the tip pale. The consistence of the body is firmer than 

 in the other genera of the family, but no structiu'al difference of 

 importance exists e.xcept the form of the antennae, which are not 

 very slender, but cylindrical ; the 2d joint is one-half as long as 

 the third ; the last joint of the maxillary palpi is large and secu- 

 riform ; the eyes are distant and moderate in size. A second 

 species I. indigacea Paso, occurs in Borneo. 



