Vol. 32, pp. 269-270 December 31, 1919 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 





NOTES ON SPHENOPHORUS (COLEOPTERA). 



BY F. H. CHITTENDEN. 



During studies of the genus Sphenophorus certain forms pre- 

 viously undescribed have come to notice. These with some 

 nomenclatorial changes, are treated briefly in the following 

 notes. 



Sphenophorus costicollis, new species. 



Form similar to robustus, distinctly more slender, a little more depressed. 

 Ground color dull red with clay-colored natural coating covering dorsal 

 surface except thoracic vittae, shining red on exposed portions of sides, 

 abdominal surface and sides of legs. 



Rostrum five-sixths as long as thorax, subequal in distal four-fifths, last 

 fifth slightly dilated with sides parallel as seen from side, posterior face not 

 produced. Thoracic vittae strongly elevated, narrow, polished; median 

 widest at middle, tapering and terminating at about the distance of one- 

 tenth to base of thorax; lateral vittae of similar width with branch faintly 

 indicated, basal half of nearly uniform width. 



Elytra completely covered with gray coating without callosities; third 

 interval wide, distinctly elevated; fifth narrower, less convex but wider 

 than fourth or sixth, lower surface including legs and other characters 

 about as in robustus. 



Length 13 mm.; width 5.5 mm. 



Described from a single female from New Orleans, La., collected April 

 26, 1918, by Mr. Thos. H. Jones. 



Type No. 22,775, U. S. National Museum. 



A well-marked species not likely to be mistaken for any described form. 



Var. callosipennis, new variety. 



Smaller than type of costicollis, ground color black or piceous, tending 

 to dark red on exposed portion of sides of abdomen and of legs; coating 

 either slightly reddish or yellowish. Median vitta a little longer. Third 

 elytral interval polished black in basal half; a distinct sub-basal and sub- 

 apical callosity. 



Length 11 mm.; width 4 mm. 



55 — Pboc. Biol. Soc. Wash., Vol. 32, 1919. (269) 



