PYTHIDAE. 255 



tral segment very short, only one-half as long as the 2d ; 5th as 

 long as the 4th. 



Lacconotus punctatus Lee., a small insect given me as found in 

 Pennsylvania, alone constitutes this tribe ; it is of narrow form 

 (•17 unc. long), black, strongly punctured, and thinly clothed with 

 short pubescence ; the thorax is rather flat, nearly square, with 

 two large .discoidal foveae ; the basal edge is tinged each side 

 with red. The elytra are wider than the thorax, parallel, rounded 

 at the tip, and not very convex ; they are punctured like the head 

 and thorax, and are slightly rugous. The 2d ventral segment has 

 a very large pale spot occupying the whole middle portion. 



I can add but little to the characters given above ; the ligula 

 and mentum are smaller than in Mycterus, and the maxillary 

 palpi less elongated. 



Fam. LIV.— PYTHIDAE. 



Mentum transverse, trapezoidal, narrower in front, sup- 

 ported on a broad and short gular process ; ligula visible ; 

 labial palpi 3-jointed. 



Maxillee with flattened, ciliate lobes; palpi 4-jointed, 

 moderate in size. 



Head not constricted behind, prominent in our tribes, re- 

 ceived by the prothorax not as far as the eyes, which are not 

 emarginate, and not finely granulated ; clypeus short, dis- 

 tinct ; labrum prominent ; mandibles short, emarginate at 

 tip, sometimes toothed internally. 



Antennas 11-jointecl, slightly thickened externally, inserted 

 under small oblique frontal ridges. 



Prothorax narrower at base, with the lateral suture dis- 

 tinct in Boros and Crymodes, wanting in the other genera ; 

 anterior coxal cavities open behind, frequently confluent. 



Mesosternum moderately long, side pieces attaining or not 

 the coxal cavities ; metasternum long (except in Cononotus), 

 side pieces narrow. 



Elytra rounded at tip, covering the abdomen; epipleurse 

 narrow, wings perfect (except in Cononotus). 



Abdomen with five ventral segments, all free ; intercoxal 

 process small, acute (except in Cononotus). 



Legs moderate ; anterior coxaa conical, usually contiguous, 

 sometimes with trochantin ; middle eoxas rounded, with or 

 without trochantin ; hind coxaa transverse, nearly contiguous, 



