24 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



Female. — Head moderately thin frontooccipitally, somewhat wider 

 than long, the face inflexed; as seen in dorsal view well rounded 

 on the sides, transverse in front between the eyes, and slightly emar- 

 ginate in a broad curve at occipital margin; in side view about one- 

 half as thick as long, the planes of the face and frontovertex meeting 

 in an obtuse angle; as seen from in front widest a little above the 

 lower ends of the eyes, well rounded on the sides above this point, 

 gently rounded medially above and with the cheeks converging to- 

 ward the mouth, so that if the lines were continued they would meet 

 in an acute angle, but they are truncated by the oral margin, which 

 is transversely arched. Occiput weakly concave, the dorsal margin 

 acute; eyes rather small, nearly circular in outline and bordering 

 the occiput posteriorly; frontovertex slightly broader than long, 

 more nearly one-half than one-third as wide as the whole head; 

 ocelli large, arranged in a large right-angled triangle, the posterior 

 pair about their own diameter from the eye margin and much closer 

 to the occipital margin ; cheeks as long as the eyes, without a genal 

 suture, and arcuately converging. Face wider than long, rather 

 depressed; the antennae inserted close together far above the oral 

 margin and about on the ocular line, the space between the sockets 

 one-half or less than one-half the distance between the sockets and 

 oral margin ; the upper half of face between the ej^es with two deep 

 linear sulcate scrobes, which are close together, nearly parallel and 

 reaching to the angulation separating the face from the frons; 

 prominence between the antennae very narrow and carinalike above 

 where it separates the scrobes, but below the antennae it broadens 

 out triangularly and extends nearly to the oral margin; sometimes 

 through shrinkage of the head the face has a large, rather deep, 

 quadrangular depression, with the two basal sides longer than the 

 ventral sides. 



Antennae with the scape short, projecting but slightly beyond 

 plane of the frons, and including the radicle shorter than the follow- 

 ing four joints combined, in shape subclavately cylindrical; pedicel 

 hardly longer than thick; funicle six-jointed, the joints subequal in 

 length, scarcely increasing in width distad, the first as long as wide 

 and about as wide as the pedicel, the sixth slightly wider than long; 

 club small, oval, three-jointed, a little shorter than the three pre- 

 ceding joints combined; all the joints of the flagellum with linear, 

 longitudinal sensoria. 



Mandibles broadly truncate at apex, with a slight emargination at 

 the outer corner, the apex lying in the same plane as the base. Max- 

 illary palpi four-jointed, rather short, the first three joints decreas- 

 ing in length, the second thickest, the third smallest and thinnest, 

 the fourth slightly fusiform, slender and very pointed at apex, nearly 

 as long as the preceding joints combined; labial palpi short and 



