NO. 1988. STUDIES OF NORTH AMERICAN WEEVILS— PIERCE. 391 



a}. Abdomen with five segments in both sexes. 



c}. Thorax and elytra covered with punctured tubercles; beak elongate; 



humeri rounded subgenus Phymatinus. 



d\ Beak finely sulcate; funicular joints elongate, setose; nasal plate ogival, 

 strongly medially depressed, apically angulately emarginate; elytra! 



intervals, only alternately tuberculate gemmatus LeConte. 



(P. Beak broadly and very deeply sulcate; hmicular joints 3-7 moniliform; 

 nasal plate elongate triangular, concave, slightly emarginate; all elytra! 



intervals tuberculate sulcirostris, new species. 



c^. Elytra not tuberculate; beak shorter and stouter; humeri small, angulate. 



subgenus Panscopus. 



dK Even elytra! intervals with a few setae near apical declivity; funicle 



setose, first two joints elongate, others moniliform; nasal plate broadly 



ogival, rimmed, concave, apically slightly emarginate erinaceus Say 



d^. Even elytra! intervals without setae; funicle setose, all joints longer than 

 broad, nasal plate ogival, rimmed, strongly medially depressed, apically 

 angulately emarginate alternatus Schaeffer. 



2. Alternate elytra! intervals hardly elevated, humeri rounded. 



sul)genus Panscopidius. 

 a\ Thorax only, tuberculate; beak moderately elongate; all elytra! intervals 

 setose; funicle closely setose, first two joints elongate, others moniliform; 

 nasal plate ogival, strongly medially depressed, apically angulately emargi- 

 nate. 

 fti. Elytra! vestiture very dense; only posterior tibiae plainly denticulate. 



squamosus, new species. 



6^. Vestiture sparser; all tibise strongly denticulate dentipes, new species- 



II. Articular surfaces of the hind tibiae terminal, almost inclosed (corbels cavernous). 



3. Alternate elytra! intervals elevated and setigerous; even intervals without 



SQtgs subgenus Nomidus. 



a\ Beak not carinate; humeri rounded. First two funicular joints elongate, 

 others moniliform ; prothorax finely impressed on median line ; nasal plate 

 ogival, rimmed, concave, deeply roundingly emarginate. . .abruptus Casey. 

 0?. Beak carinate; prothorax widely impressed on median line. 



b^. Humeri minutely angulate. All funicular joints longer than wide; species 

 . 9 mm. long; nasal plate ogival, rimmed, concave deeply emarginate. 



impressus, new species. 



b- Humeri rounded; only first two funicular joints longer than wide; species 



6.5 mm. long; nasal plate short, ogival, concave, rimmed, angulately 



emarginate ovalis, new species. 



4. Alternate elytra! intervals not conspicuously elevated; all intervals setigerous. 



subgenus Neopanscopus. 

 a\ Beak elongate, considerably longer than head, smooth, not carinate; humeri 



rounded asqualis Horn. 



b\ Prothorax deeply sulcate; nasal plate broadly rounded, punctate, rather 



poorly defined var. vestitus Casey. 



62. Prothorax less deeply sulcate; nasal plate ogival, more acute at apex. 



var. sequalis Horn. 

 a^. Beak not much longer than head, broad. 

 c^ Beak smooth, not carinate; humeri rounded; nasal plate very poorly defined 

 by an arcuate raised area, punctate, emarginate. 



squamifrons, new species. 



c2. Beak carinate; humeri minutely angulate; nasal plate defined by an oval 



rim, basally truncate and notched, concave carinatus, new species. 



By interpreting Panscopus in the broader sense as above we obtain 

 a generic aggregation of nearly related species, which may however 



