Dec, 19I3-] MeLANDER: SYNOPSIS OF DiPTERA. 295 



acrostichals. Front femora with a pronounced thorn. Wings hyaline, veins 

 yellow. 



Three specimens, Woods Hole, Massachusetts, July i6, 1902. 



This species differs from occipitalis in the shape of the face, posi- 

 tion of the fronto-orbitals, structure of the mouth, as well as in color 

 and size. It can hardly be Loew's terminalis. 



PSEUDODINIA Coquillett. 

 Front below the ocelli broader than long ; apices of third and fourth veins 

 diverging; black, the proboscis, halteres, tarsi and apices of the tibiae 

 yellow, the thorax thinly gray pruinose. 1.5 mm. (N. Mex.) 



varipes Coquillett. 

 Front below the ocelli square; third and fourth veins not diverging; black, the 



proboscis, halteres, tarsi and apices of the tibiae yellow 2. 



2. Occiput, notum, first three segments of the abdomen, and the femora cine- 

 reous pruinose, the front femora with stout bristles. 2 mm. (Tex.*) 



pniiiwsa new species. 



Head, mesonotum, scutellum and abdomen polished black, only the noto- 



pleural suture pruinose ; femora shining black, not bristly. 2 mm. 



(Id.*) nitida new species. 



Pseudodinia pruinosa new species. 



Male. — Length 2 mm. Black, the proboscis, end of tibiae and the tarsi 

 yellow, the halteres white. Front polished black, with a broad, shallow, trans- 

 verse depression above the antennae, that part of the front between the an- 

 tennae and the ocelli square, bearing two small reclinate fronto-orbitals ; ocellar 

 bristles small and distant, postverticals small and decussate. Face, cheeks and 

 occiput cinereous-black ; no vibrissas ; cheeks one sixth the eye-height. Two 

 dorsocentrals placed well back toward the scutellum, about eight irregular 

 rows of minute acrostichals ; entire thorax cinereous pruinose. First three 

 segments of the abdomen lightly cinereous pruinose, the remaining segments 

 polished black. Legs rather short and robust, the femora and base of tibiae 

 cinereous, front femora bristly, middle tibiae with apical spur. Calypteres 

 white, with rudimentary fringe. Wings hyaline, veins yellowish, the auxiliary 

 vein distinctly separated from the first throughout its entire course though 

 approaching it before the end, the first vein there bent so as to end near the 

 middle of the wing; costa unbroken; third vein ending near the tip of the 

 wing; the sections of the fourth vein proportioned one to two, of the fifth 

 vein three to one. 



One specimen, Austin, Texas, May 11, 1900. 



Pseudodinia nitida new species. 



Female. — Length 2 mm. Slender, shining black, the proboscis, end of the 

 tibiae, the tarsi and the very narrow pleural sutures testaceous ; halteres and 



