222 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



15. STENUS ADAMSONI, new species 



Description. — Piceous. Head with two distinct short longitudinal 

 impressions between the ej'es ; middle elevation with indefinite smooth 

 area, also one at upper apical corner of eye, and one behind antennal 

 ridge; hibrum broadly rounded; punctures moderate but deep and 

 irregular, intervals convex, shining; without ground sculpture; pu- 

 bescence distinct. Pronotum, about as long as wide, widest near mid- 

 dle ; sides feebly arcuate in front, feebly emarginate behind ; punctures 

 rather coarse but very irregular, sometimes partly united and some- 

 times leaving wide smooth spaces between ; without ground sculpture ; 

 pubescence short but distinct. Elytra three-fifths wider than pro- 

 notum, one-seventh wider than long; humeral callus slightly prom- 

 inent; punctured similarly to pronotum but a little more coarsely, 

 sparsely, and regularly; intervals convex; without ground sculpture; 

 pubescence short but distinct. Abdomen not margined; punctured 

 similarly to elytra but less densely, less coarsely especially posteriorly, 

 and less deeply; without ground sculpture; pubescence short but 

 distinct. Tarsus with fourth segment bilobed. Male^ unknown. 

 Female^ ventral abdominal segments not modified except for denser 

 punctures at middle of apical segments. Length, 4 mm. 



Type locality. — Trinidad, Department of Agriculture Grounds, 

 Port of Spain. 



ry/^^s.— Holotype, female, U.S.N.IM. No. 52385, collected October 

 24, 1918, by Harold Morrison. 



Records. — The following is the only record known to me : 

 Trinidad: Port of Spain (Morrison, in U.S.N.M.). 



Specimens examined. — I have seen only the unique type. 



Remarhs. — This species is not strongly separated from cuhanus but 

 it seems best at present to separate it even though the male is unknown. 

 It may prove to be a South American species, but I have been unable 

 to find any to wliich it can be ascribed. 



I have no record of the habits of this species. 



16. STENUS DARLINGTONI, new species 



Description. — Piceous. Tiead feebly but broadly biimpressed be- 

 tween the eyes; median elevation with a definite and distinct smooth 

 area extending throughout the vertex but much broader posteriorly ; 

 also indefinite areas along eye and behind antennal ridge; labrum 

 broadly rounded; punctures rather fine but irregular and deep, the 

 intervals very convex and shining; without ground sculpture; pu- 

 bescence short but distinct. Pronotum one-fifth longer than wide, 

 widest near middle; sides almost straight from middle to front angles, 

 feebly emarginate behind ; punctures coarse and ver}' irregular, some- 

 times more or less united in grooves, usually with an irregular smooth 



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