168 Psyche [December 



long as the cell; posterior cross-vein a little more than its length 

 distant from mid-cross vein. Hal teres with greyish stem and very 

 dark knob. 



Length about 3 mm. (body) proboscis 1.5 mm. 



Taken July 28, Comacho Reservoir, Empire, Canal Zone, 

 Panama. 



Described from one specimen in good condition bred from larvae 

 taken at Comacho, and sent by Colonel H. S. Greenleaf, M. C, 

 U. S. Army, Department Surgeon. A specimen which is probably 

 the same was sent some time since, but was in such bad condition 

 that, although it was believed to be a Stethomyia probably lying 

 close to nimba, it was impossible to place. This I should also 

 place as a Stethomyia, but hesitate to do so because the scales on 

 the vertex are not true flat scales. However Theobald (Mono. 

 Cul. Vol. IV, p. 59) divides Stethomyia into two groups and 

 remarks "Group B has the cephalic scales not quite so flat as in 

 A," and James and Liston in describing Stethomyia culiciformis 

 speak of "a few white spindle-shaped scales in the middle line in 

 front" (Mono. Ind. Anoph., p. 122, 1904), and it may be that the 

 genus includes some in which these scales are not true flat scales. 

 At all events it does not resemble nimba in the thoracic marking, 

 and the palpal markings are very distinctive. 



Trichoprosopon (Joblotia) shropshirei sp. no v. 



Female. Head light brown, covered with flat brown scales, 

 lighter at the sides, and a row of dark brown forked scales at the 

 nape; antennae brown, verticels and pubescence brown, basal joint 

 brown; proboscis long and slender, sometimes a little swollen 

 near the apex, covered with dark brown scales having a bluish 

 iridescence, a few dark bristles at the base, labellje small, brown; 

 palpi short, about one-tenth the length of the proboscis, dark 

 brown; clypeus dark brown, with a row of minute dark brown 

 hairs, on the anterior margin; eyes brown. 



Thorax partly denuded, prothoracic lobes not contiguous, covered 

 with large dark brown flat scales, somewhat elongated, and dark 

 brown bristles, the latter mostly on the cephalic margin; mesono- 

 tum pale brown, and lighter laterad, sparsely covered with rather 

 broad flat brown scales, except at the angles of the shoulders where 

 the scales are a shiny yellowish white and merge into the very 



