440 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 59. 



series of fine ridges, dull, not polished. Head broader than thorax, 

 facial line 1.06 times transfacial, interocular line 0.4 transfacial and 

 area two-thirds as broad as high, malar space 0.43 eye, radially 

 striate about mouth, antennae arising above middle of eyes and facial 

 outline in side view angled at that point, antennae 13-segmented, 

 3-6 slender, long-cylindrical and closely joined, 7-13 cylindrical but 

 rounded at ends, becoming somewhat stouter but none broader than 

 second, not forming a club, last three infuscated, third five times as 



long as broad; relative 

 lengths as 7: 6:15:17:17: 16: 

 14:13:11:11:10:10:12. Pro- 

 no turn with truncature 

 0.42 times width of head. 

 Mesoscutum broader than 

 long. Scutellum 0.74 

 length of mesoscutum, disk 

 coarsely alveolate, rounded 

 behind, cup narrow, taper- 

 ing in front into a narrow 

 septum which separates 

 the two deep pits which 

 are longer than broad, cup 

 not as broad as a pit, and 

 at its posterior end is a 

 small pit in front of which 

 is a prominent tooth mak- 

 ing the cup in side view 

 resemble the open mouth 

 of a snake, axillae aciculate. 

 Mesopleura separated from 

 sternum by a sharp carina 

 with a fainter carina above. 

 Hind tarsus longer than 

 tibia, claws simple. Veins in fore wing pale, radial cell closed and 

 three times as long as broad, cell to wing ratio 1:4.7, no areolet, 

 pubescent and ciliate, reaching far beyond tip of abdomen. Abdo- 

 men only normally compressed, longer than broad, truncate behind, 

 second segment occupying whole length and with hairy ring at base. 

 Length, 1.8 mm. Wing, 2.3 mm. Antenna, about 2 mm. 

 Male. — Antennae 15-segmented, 3-5 equal, third excavated and 

 longer than 1 plus 2, 6-14 gradually shorter, last slightly longer than 

 preceding, distal half infuscated. Abdomen longer than broad, 

 truncate behind. 



Length, 1.5 mm. Wing, 1.95 mm. Antenna, over 2.5 mm. 

 Described from three specimens, one male and one female captured 



Fig. 3.— Dieucoila subofaca Ashmead, wing, antenna 

 and face at same magnification. 



in September and one female in April. 



