1873.| 411 [Horn. 



S. latinasus, n. sp. 



Moderately elongate, black, shining. Rostrum slightly longer than 

 half the thorp x, moderately compressed, rather suddenly dilated at apex, 

 sparsely punctured, base rather suddenly dilated, above channelled. 

 Thorax longer than wide, constricted in front, rather rapidly dilated to 

 apical third, thence sub-parallel to base, above with three elevated, 

 polished, entire vittae, the median broadest at apex, then slightly narrower 

 and elongate fusiform to base, lateral vitt?e parallel, with a lateral branch 

 toward the basal angle. Scutellum very feebly grooved. Elytra similar 

 in form to cariosus, surface finely striate, striae moderately coarsely 

 punctured, punctures of the striae opposite, regularly placed, intervals 

 flat, sutural interval shining, sparsely punctulate, third cariniform for 

 half its length and with the humeral callus smooth, the other intervals 

 clothed with luteous coating. Pygidium scarcely narrower to apex, sub- 

 quadrate coarsely punctured, with short setae and a short tuft of hairs 

 on each side of apex. Body beneath coarsely and sparsely punctured. 

 Length .40 inch ; 10 mm. 



This species appears to combine the thoracic sculpture of costipennis 

 with the elytral sculpture of cariosus, but differs from any species known 

 to me by the curious form of the tip of the rostrum. The rostrum is 

 rather suddenly dilated at tip and apparently slightly obliquely truncate, 

 so that when the rostrum is examined at its end, there is seen above the 

 mandibles an oval space, so that the parts of the mouth are more in- 

 ferior than usual. The third joint of the hind tarsi is fully as dilated as 

 those of the middle and anterior, and is also spongy pubescent at the 

 sides, so that in this respect it has the character of the preceding group, 

 and would have been placed there except that it lacks the glabrous 

 natural coating, and the lateral vittae have the external branch. 



One specimen, Georgia. 



Group V. « 



The third joint of all the tarsi in this group is of a sub-conical form, 

 scarcely at all flattened, and beneath sparsely fimbriate at the antero- 

 lateral margin. 



The species are exceedingly troublesome to define, and tabulate in a 

 satisfactory manner. 



A. Rostrum arcuate, usually slender. Tibiae simple. 



Thorax more or less distinctly vittate. 1. 



Thorax punctured nearly equally over the entire sur- 

 face, rarely with a smooth, median, not elevated line 

 or space, but never with any traces of lateral vittae. 2. 



1. Median vitta entire in front. 3. 



Median vitta bifurcate in front, enclosing a slight fovea 



immediately behind the apical constriction. 4. 



