150 Journal New York Entomological Society, t'^'"'- xxix. 



Thinobius grandicoUis new species. 



This species is close to the preceding two. It differs by its head distinctly 

 narrower than the thorax, which is proportionally larger and as wide as the 

 elytral humeri. In the two preceding the thorax is perceptibly narrower than 

 the humeri. Thorax one half wider than long, sides and base rounded, basal 

 impressions distinct. Head much more distinctly transverse, fully a third 

 wider than long, antennae shorter but distinctly longer than the head and 

 thorax, second and third joints about a third longer than wide, outer joints 

 as wide as long, terminal joint subequal to the preceding two. Elytra scarcely 

 perceptibly wider at apex, with the sides straight. Length 1.2 mm., width 

 .4 mm. I specimen. 



Type 26 May. 



Thinophilus caseyi new species. 



Form moderately slender, depressed, parallel. Color brownish testaceous, 

 head darker, antennae, legs and elytra paler, abdomen piceous black; antennae 

 slightly infuscate apically. Head, thorax and elytra densely and finely punc- 

 tured but somewhat shining. Head slightly transverse, as wide as the thorax, 

 widest at the base where it is truncate and strongly constricted ; eyes small, 

 tempora as long as the eyes, posterior angles narrowly rounded. Antennal 

 tuberculations strong, pubescence on head and antennae long, coarse and abun- 

 dant, conspicuous. Antennje long and slender, reaching the middle of the 

 elytra, feebly incrassate distally, first joint stout, cylindrical, nearly three times 

 as long as wide, second shorter, more slender, strongly narrowed basally, three 

 to seven globular, subequal, eight feebly obconic, nine and ten elongate, nearly 

 a third longer than wide, eleven more than twice as long as wide, acutely 

 pointed, not quite as long as the preceding two. Thorax one sixth wider than 

 long, scarcely narrower than the elytra, widest close to the apical margin, sides 

 and base completely and evenly rounded, disk unimpressed. Elytra parallel, 

 one fourth longer than wide and one half longer than the thorax, sides straight. 

 Abdomen as wide as the elytra, sides arcuate, surface evenly alutaceous, some- 

 what shining, punctures sparse and indistinct. Pubescence on thorax and 

 elytra fine, dense and short, on abdomen coarser and longer with longer bristles 

 intermixed. Length 1.2-1.4 mm., width .3— .4 mm. 



Type and four paratypes 26 May. 



This species is very distinct by its antennal strttcture and the 

 proportions of the thorax and elytra. 



Thinophilus apicicornis new species. 



Form moderately slender, parallel, depressed. Color black, basal joint of 

 the antennas and elytra slightly picescent, legs brownish testaceous. Head, 

 thorax and elytra punctured as in the preceding, feebly shining. Head scarcely 

 transverse, very slightly wider than the thorax, tempora as long as the diam- 

 eter of the eyes, parallel, suddenly narrowed to the neck ; posterior angles 



