NORTH AMKRICAN COLEOPTERA. 131> 



DACODERUS Lee. 



This genus now contains three species which may be distinguished 

 in the following manner : 



Eyes situated at the hiud angles of the head; head and thorax longitudinally 

 striate. 

 Disc of elytra flat, with the suture slightly elevated, relatively coarsely and 



closely punctate striaticeps. 



Eyes in front of the hind angles of the head ; elytra not flattened on the disc. 

 Head and thorax longitudinally striate; elytra not distinctly punctate. 



Isevipeiinis. 



Head not striate, occiput coarsely sparsely punctate, thorax in front with few 



punctures <loininiceiisis. 



D. Isevipennis n. sp. — Elongate, chestnut-brown, shining. Head quadrate, 

 distinctly prolonged behind the eyes and abruptly narrowing, front deeply con- 

 cave, the excavation deeply prolonged on the epistonia, occiput rather deeply 

 striate. Thorax one-third longer than wide, much narrowed at apex, sides an- 

 teriorly strongly arcuate, thence parallel to base interrupted at middle by an 

 oval, smooth tubercle, disc deeply excavated at middle, the excavation prolonged 

 less deeply to the base, surface deeply striate at middle in front, punctate at 

 sides, posteriorly sparsely punctate. Elytra elongate oval, nearly three times as 

 long as wide, disc not flattened, a few obsolete punctures at base, a few sparsely 

 placed short hairs, subsutural stria fine. Body beneath nearly smooth, the ab- 

 domen sparsely obsoletely punctate, a group of coarse, closely placed punctures 

 in front of the anterior coxa*. Legs sparsely punctate. Length .18 inch. ; 4. .5 mm. 



The essential differences between this and the two previously de- 

 scribed species are given iu the table. Others, however, exist which 

 have some importance. In striaticeps the thoracic depression is not 

 prolonged to the base, in dominicensis it is prolonged as a ti'iangular 

 depression ; in the present species as a deep groove with parallel 

 sides entirely to the base. The entire prosternum and flanks are 

 coarsely closely punctate in striaticeps, the middle of the prosternum 

 alone in dominicensis, while there is but a small group of punctures 

 in the present species. It is possible in the two older species to pass 

 a hair from the excavation at the middle of the thorax under the 

 oval tubercle and out at the side, but in the present species there is 

 a complete, or nearly so, closure of that passage, 



In examining dominicensis at the present time a small brush of 

 hair was observed at the middle of the front femur on the undei'side ; 

 a specimen of striaticeps has the same character. This is probably 

 sexual, as the specimens are of the slenderest of the forms. 



The present species was given me by Mr. A. Bolter, and was col- 

 lected in Texas. 



TRANS. AM. ENT. SOC. XX. JUNE. 1893. 



