NO. 198S. STUDIES OF NORTH AMERICAN WEEVILS— PIERCE. 389 



large, truncate at base, sides almost parallel, narrowed obliquely to 

 base and apex; transversely impressed before apex; ocular lobes 

 broad but not strong, vibrissas short, black. Elytra with sides 

 parallel in median half, narrowed at base and to apex; humeri small 

 but distinct; interspaces convex, alternately more so; strias shallowly 

 impressed; strial puncture squamigerous, large, round, widely sepa- 

 rated; scaly vestiture dense, tessellate; setae black, curved, recum- 

 bent; sutural interspaces keeled on summit of apical declivity. 

 Undersides densely squamose with lighter scales, moderately pilose 

 with recumbent hairs; anterior tibiae bent near apex; all tibiae den- 

 ticulate and mucronate; apical area of posterior tibiae elliptical. 

 Type.—Cat. No. 14638, U.S.Nat.Mus. 



DYSLOBUS SEGNIS LeConte. 



The nasal plate is a large, triangular, longitudinally depressed, 

 rimmed, impressed, glabrous, basally emargitiate area. 



DYSLOBUS LECONTEI Casey. 



The nasal plate is somewhat raised, poorly defined, with both edges 

 arcuate, and lateral ends rounded, surface minutely punctate. 



DYSLOBUS VERRUCIFER Casey. 



The nasal plate is poorly defined, the boundary being broadly 

 elevated but not ridged or rimmed, the area depressed, minutely 

 punctate and subcrescentiform. 



DYSLOBUS DEBILIS Casey. 



Amnesia debilis Casey. 



Material from Vancouver, Oregon, and Washington is at hand. 

 The latter was formerly ascribed by the writer to sculptilis. The 

 nasal plate is small, depressed, shining, crescentiform, and fairly 

 sharply defined. 



DYSLOBUS SQUAMIPUNCTATUS Pierce. 



Amnesia squamipundata Pierce. 



The nasal plate is broadly angulate crescentiform, depressed, and 

 poorly defined. 



DYSLOBUS DECORATUS LeConte. 



Amnesia deforata Horn. 



The nasal plate is small, depressed, crescentiform, and poorly 

 defined. 



DYSLOBUS URSINUS Horn. 



Amnesia ursina Horn. 



The nasal plate is moderately large, triangular, with curved sides; 

 glabrous, punctate, emarginate, and well defined. 



