AMERICAN COLEOPTERA. til 



convex, prominent, anteniipe rather stout, extending behind the elytra, as long as 

 the wings, second joint equal to third ; penultimate ventral segment convex, in- 

 flated, larger in fact than the head, embracing the penultimate dorsal on the sides, 

 emarginate behind, and deeply and broadly excavated; lateral lobes broad, large, 

 triangular ; last ventral elongate, broad at base, then produced as a narrow obliquely 

 ascending process slightly nicked at tip ; penultimate dorsal large, last dorsal trans- 

 verse, broadly emarginate, fringed behind, concave beneath; accessory processes 

 not seen. Length 2—3 mm. : N. H.; Mass.; Pa .' 3. COiicavuS Lee. 



C. 



Last dorsal segments not prolonged 2. 



Last dorsal segments prolonged o- 



2. — Last ventral segment narrow, prolonged, cleft or nicked at tip 3. 



Last ventral segment wider, parallel...., 4. 



Last ventral slender forked, slender, piceous, base of antennse, narrow bead 

 of prothora.x and base of antennte testaceous; prothorax smooth, a little 

 wider than long, very narrowly margined, anterior and posterior angles 

 impressed ; antennae % nearly as long. J about one-half as long as the 

 body, second joint two-thirds as long as third ; % last dorsal segment obtusely 

 rounded without processes, seventh ventral prolonged into a very slender 

 process, which is strongly curved, and deeply forked with diverging processes 

 at the tip. Length 3 mm. ; Va.," Deer Park 11. captiosus n. sp. 



3.— Last ventral % straight, margined each side, narrower towards the tip, "which 

 is acutely nicked. Piceous, prothorax tinged with testaceous, transverse, 

 finely margined, front angles obliquely truncate; antennae % two-thirds, 

 9 one-half as long as the body, with fourth and following joints longer 

 than the second or third. Length 2—3 mm.; Pa.; Va. ; Ga. ; Cal. 



4. Tragi li!$ Lee 



Very similar to/raf/i/is but the prothorax. front legs, and base of the antcnnaj 



are yellow , % last ventral is narrower, prolonged, channeled, and acutely 



emarginate at tip. Length 2.5—3 mm.; Pa.; Md 5. exilis Mels. 



Last ventral % bent in a sinuate manner obliquely upwards, and more deeply 

 nicked at tip than mfragiiis, prothorax transverse, finely margined, tinged 

 with testaceous; head black, eyes large, prominent, antennae long, slender, 

 fourth and followingjoints longer than second or third, % two-thirds, 9 one- 

 half as long as the body. Length 3 mm. ; Cal 6. tu!iiculli!« Lee. 



a. — Prothorax yellow testaceous. 9 • 

 Last ventral % stouter, straight, scarcely nicked at tip ; testaceous, head black, 

 eyes moderately large, prothorax transverse, finely margined, elytra piceous 

 at tip ; antennae stout, piceous, with first and second joints testaceous, third , 

 joint not shorter than fourth, in % nearly as long, in 9 about two-thirds as 

 long as the body. Length 2—3 mm. ; Va. ; Ga 7. rectus n. sp. 



4.— Last ventral % large, parallel, curved upwards, channeled for its whole length, 

 deeply emarginate or rather forked at tip; last dorsal with two short acute 

 processes ; accessory processes slender but small ; piceous, head black, pro- 

 thorax rufo-piceous, legs testaceous, the former a little wider than long, side 

 margin very narrow, front angles impressed; antenna rather stout, as long 

 as the elytra, third joint not shorter than fourth ( % ). Length 3 mm. ; 111. ; 



Qjjg * 8. curvatus n. sp. 



Similar to curvatus, but the last ventral is testaceous and narrower, with the 

 fork more slender, penultimate ventral deeply emarginate; penultimate 



(11) 



