STAPHYLINID^E. 13 



parallel at the sides, the eyes prominent, very finely faceted, at a little 

 less than their own length from the base; antenna? pale brown, not very 

 short, gradually and moderately incrassate, the second joint slightly shorter 

 than the first and distinctly shorter than the third, four to six distinctly 

 longer than wide, the tenth obtrapezoidal, a third wider than long, the 

 last as long as the two preceding, the transverse suture beyond the 

 middle distinct; prothorax fully tAvo-thirds wider than long, distinctly 

 wider than any part of the elytra, widest slightly behind the middle, 

 the sides evenly and strongly arcuate, converging and straighter ante- 

 riorly; base arcuate, becoming feebly sinuate at each side, the angles 

 nearly right and not rounded; surface with a broad and very feeble 

 median impression from near the base almost to the centre; elytra rather 

 transverse, parallel, with straight sides, the suture about as long as the 

 prothorax, the apical sinuses deep; abdomen but little narrower than 

 the elytra, parallel, with thick margins, the tip paler, the fifth tergite 

 (cf) not longer than the fourth, with a minute feeble tubercle on the 

 median line at some distance from the apex, the sixth short, rapidly 

 narrowed to the apex, which is evenly sinuate in circular arc between the 

 rather prominent angles, the edge of the sinus minutely and rather ob- 

 tusely crenulate. Length 2.7 mm.; width 0.8 mm. Massachusetts 

 (Tyngsboro) , Frederick Blanchard. 



Readily distinguishable from laticollis by its stouter form, larger 

 and more transverse head and relatively shorter and more trans- 

 verse elytra, the suture in that species being very distinctly longer 

 than the prothorax and the pronotum without the large feeble 

 basal impression of blanchardi; the abdomen in the latter, also, is 

 more finely and closely punctured. The original type of laticollis 

 is a male, having the same modification of the sixth tergite as 

 blanchardi, the sinus however having stronger, less close and more 

 acute crenulation, but there is no trace of the minute tubercle of 

 the fifth tergite. 



Thiasophila wickhami n. sp. Coloration and sculpture nearly as in 

 the preceding, the form not so stout, the sculpture of the abdomen more 

 distinctly imbricate than in any other species; head similarly transverse, 

 relatively a little larger, very distinctly more than half as wide as the 

 prothorax, the eyes rather smaller and less prominent; antennae much 

 smaller, a little less incrassate, blackish-piceous, slightly paler basally 

 and at the tip, the second joint much snorter than the very elongate 

 third, fourth slightly elongate, obtrapezoidal, fifth to eleventh more 

 densely pubescent than the first four as usual, the fifth as long as wide, 

 tenth slightly wider than long, the last fully as long as the two preceding, 

 with the transverse division very strongly marked; prothorax short, 

 fully three-fourths wider than long, exactly equal in width to the elytra, 

 the sides broadly, evenly rounded, converging anteriorly, becoming 

 subparallel behind the middle, the base broadly rounded, feebly sinuate 



