148 XEW NORTH AMERICAN ANTHOMYllDAE (dIPTERA) 



black spot on each side of dorsuin. Legs black. Wings slightly grayish. 

 Calyi^trae white. Halteres yellow. 



Frons at vertex nearly one-third as wide as head, slightly narrowed at 

 center, where it is over twice as wide as the distance across posterior ocelli; 

 orbits almost linear, each with four to five bristles and a few weak hairs, 

 the bristles all incurved; face slightly convex in profile, the frons, at base 

 of antennae, produced a little further than vertical line of vibrissal angle; 

 antennae elongate, the third joint acutely pointed at apex on upper side; 

 arista with the longest hairs about equal in length to basal diameter of arista; 

 l)arafacial in profile broader than third antennal joint, its width equal to 

 two-thirds the height of check, the latter about one-fifth as high as eye, its 

 margin with a series of moderately strong bristles and above these a few- 

 weak hairs, the hairs above vibrissa few and weak. Thorax with three 

 pairs of postsutural dorso-central bristles; presutural acrostichals two-row-ed 

 just in front of suture; prcapical scutellars absent; sternopleurals 1:2. Fore 

 fil)ia unarmed at middle; mid tibia with one antero-dorsal and two postero- 

 dorsal bristles; hind femur with a series of rather long hair-hke bristles on 

 basal half of postero-ventral surface, the antero-ventral surface with three 

 to five strong bristles on apical half; hind tibia with two antero-dorsal and 

 two antero-ventral bristles, and one or two weak postero-dorsal setulae. 

 Third vein bare at base; veins three and four subparallcl apically; apex of 

 wing almost midway between veins three and four. 



Female. — Differs from the male in being darker colored, with the frons 

 less distinctly pruinescent, and the abdominal markings less distinct. 



The frons is slightly over one-third of the head-width, and the orbital 

 hairs are more numerous than in the male. The body is ovate and the geni- 

 talia without curved apical thorns. 



Length, male, 5 mm.; female, 5 to 6 mm. 



Type. — cf; Swarthmorc, Pennsylvania, August, 1008, [A. N. 

 S. P., Type no. 6225]. Allotype. — 9 ; Swarthmorc, Pennsylvania, 

 June 26, 1910, along sliady creek, (E. T. Cresson, Ji'.). Para- 

 typea. — 2 females; Swarthmore, Pennsylvania, July, 1908; Jack 

 Run, Allegheny, Pennsylvania, June 14, 1908. 



The \vi(l(>ly separated eyes of the male, and the acute angle of 

 (liii-d antennal joint will separate this species readily from any 

 so far tlescribed from North America. 



Limnophora brevicornis Mailocli 



11)17. Telramerinx hrevicorids iVhilloch, Can. Ent., L, p. 22(). (Feuuile.) 



I had only females of this species at the time when I wrote the 

 specific description, and, as that sex of the species agrees very 

 closely wilh lliosc of the genotype of Tclratncritnv, I erroneously 

 I)lace(l il ill that genus. 



