14 Bulletin of the Brooklyn Entomological Society Vol. XI 



punctate than above, sixth segment of male with a moderately deep sub- 

 equilateral triangular emargination. Front tarsi very slightly dilated, 

 scarcely more evidently so in the male. 

 Length 6.5-7.5 mm. Seattle, Washington. 



For the series in my cabinet I am indebted to Prof. O. B. 

 Johnson, of the University of Washington. This is a very dis- 

 tinct species, qtiite different in general appearance from any 

 other in our fauna ; in fact its resemblance to certain species of 

 Philonthus — such as quadricollis or sordidus — is much more 

 marked. In its strongly shining head and prothorax it is only 

 approached by seminitens, after which it should be placed, 

 although really belonging to the group which follows, from all 

 of which the highly polished prothorax will separate it. 



Laricobius laticoUis n. sp. A series of specimens from Seattle, Wash- 

 ington, differ so constantly in several respects from L. erichsoni that I 

 have no hesitation in pronouncing them distinct. The form is perceptibly 

 stouter than in erichsoni, the color above uniformly testaceous or rufo- 

 testaceous, head brownish piceous, body beneath black, the legs and pro- 

 pleura rufotestaceous. The prothorax is more strongly transverse than 

 in erichsoni, and the erect hairs of the upper surface are shorter. There 

 is no trace in any of the fourteen examples before me of the elytral, su- 

 tural and lateral blackish stripes so constant in erichsoni. 



Length 2.25-2.5 mm. In erichsoni the length is seldom as great as 

 2.25 mm. 



I am indebted to Prof. O. B. Johnson, who writes that they 

 were taken from Douglas fir on the campus of the University of 

 Washington, February and April. He has the species also from 

 Columbia Gorge. 



A NEW GENUS AND SPECIES OF HELOMYZID^ 

 C> (DIPTERA). 



By J. R. Malloch, Urbana, 111. 



The genus described herewith may be recognized as a helo- 

 myzid by the distinctly spined costa, the very small size of the 

 calyptrse, the absence of tibial bristles except at apices, and by 

 the venation. The vibrissse are not differentiated. The first 

 example of the species that was taken, a female, proved a puzzle 



