634 Coleopterological Notices, VII. 



densely punctate. Elytra rather more than 3 times as long as wide, fully 23^ 

 times as long as the prothorax and equal in width to the apical parts of the 

 latter ; sides straight and parallel ; humeri slightly prominent anteriorly ; 

 apex near the suture narrowly arcuato-truncate, with slightly prominent 

 lateral limits ; surface feebly elevated near the suture, each elytron also having^ 

 four fine and very feeble longitudinal ridges, separated by three shallow flat 

 and impunctate grooves, which are separated from each other by shallow flat 

 intervals equal in width to the grooves ; flanks also with shallow flat striae, the 

 third interval from the side margin with some elongate scratch-like punctures 

 toward base. Under surface with moderately close punctures, those of the ab- 

 domen very elongate and linear toward base. Length 4.65 mm.; width 

 0.8 mm. 



Central Texas (Colorado River). 



This form is very different in sculpture from our otlier species, 

 but resembles certain Central American species in that feature. 

 The fine flat grooves of the elytra give these an appearance of 

 having been drawn like a wire ; the ridges become quite strong on 

 the apical declivity as usual. 



Extensus seems to be closel}'" allied to affinis Shp.,from Central 

 America, and also to trilineatus Reitt., from Colombia. The 

 latter diflers in having the prothorax narrowed behind from the 

 middle and not from near apical third. 



CERYLON Latr. 



The following table includes all the American species of this 

 genus known to me at f)resent : — 



Upper surface without distinct setse ; size smaller, always much under 3 mm. 

 Clypeus evenly sinuate at apex. 

 Prothorax not wider anteriorly, flnely or moderately punctate. 

 Prothorax about as long- as wide. 

 Scutellum short, broadly rounded behind. 



Clypeus notably smaller, more deeply sinuate; body stouter, the 

 pronotum more strongly punctate and more convex with the sides 



slightly arcuate sylTaticum n. sp. 



Clypeus large, very feebly sinuate at apex; prothorax with straight 

 sides, rounding anteriorly {angustulum Lee. ) ...castaueum Say 

 Scutellum longer, broadly angulate behind; prothorax narrower, still 

 more finely and remotely punctate and subsinuate at the sides be- 

 hind the middle; elytral striae fine, feeble and very finely punctate; 



clypeus feebly sinuate at tip unicolor Zieg. 



Prothorax distinctly shorter than wide; body stouter and more convex. 



simplex Lee. 



Prothorax wider anteriorly, quite coarsely and deeply, though not densely, 



punctate throughout Sticticuni n. sp. 



