Casey — A Revision of the American Paederini. 103 



sparsely, not very coarsely punctate; in the female quadrate, distinctly 

 wider than the prothorax though much shorter; abdomen nearly as 

 wide as the elytra, minutely and more closely punctured than usual. 

 Male with the tifth ventral rathor narrowly and feebly impressed along 

 the middle, the impression beginnin<^ near the base and extending, 

 slightly broadening, to the apex, the latter rectilinearly truncate; sixth 

 ventral with a large oval shallow and clearly limited impression^ clothed 

 with sparse spiculiform hairs and extending from near the base to the 

 apex, where there is a small emargination, slightly wider than deep, 

 narrower than the irapiession — which is a third as wide as the seg- 

 ment — and enclosed between very short projecting processes. Length 

 5.5 mm.; width 0.82 ram. Massachusetts (Lowell), — Mr. F. Blanch- 



ard scolopacea n. sp. 



Body nearly similar to the preceding but a little larger and more slender, 

 pale brownish-testaceous throughout, the abdomen blackish except 

 toward tip; antennae dusky; head suboval, slightly wider than the 

 elytra in the male, equal thereto in the female, very feebly enlarged 

 toward base in the male, parallel in the female, the sides very feebly 

 arcuate; basal angles less rounded than in scolopacea; antennae nearly 

 similar; punctures rather sparser; prothorax narrower and more 

 elongate, distinctly narrower than the head in both sexes, less strongly 

 punctured; elytra similar in the sexes, barely as long as wide, with the 

 sides obviously diverging, very slightly wider and much shorter than 

 the prothorax, feebly and sparsely punctate; abdomen subparallel, a 

 little narrower than the elytra, minutely, not very closely punctulate. 

 Male with the fifth ventral broadly, feebly impressed in more than 

 median fourth from a little before the middle to the apex, the latter 

 truncate; sixth with a shallow oval impression and apical emargination 

 nearly as in scolopacea. Length 5.8 mm.; width, 0.78 mm. Lake 

 Superior iuops Csy. 



It will be observed that the secondaiy sexual characters of 

 the male remain virtually constant in type throughout and 

 constitute as valid a generic character as any other structural 

 modification. These characters are modified to some extent, 

 as a matter of course, giving such forms as described under 

 othioides, nigrolinea and scolopacea. The form of the modi- 

 fication of the sixth ventral in the nigrolinea group, reminds 

 us of the form assumed in certain Scopaei, notably Scopaeoma. 

 Inops was united with o^/^^o^(Zes some years ago, as a synonym 

 of that species, but there is no close resemblance between 

 them. 



Latlirolepta n. gen. 



This genus is well distinguished from any of the preceding 

 by the form of the gular sutures, the narrow, deep, acutely 



