ALDRKJH AND DARLINGTON. 71 



''Achsetomiis pilosus ♦ ♦ ow gpo f ic s.— Reddish brown, thescutellum and 

 legs yellow, bases of abdominal segments three to five dark brown, hairs and 

 bristles black. Hairs of cheeks covering their lower half, no bristles near 

 vibrissse. Pleura almost wholly covered with hairs except the portion posterior 

 to the sternopleura, one sternopleuial bristle, no other pleural bristles present ; 

 scutellum without hairs, four scutellar bristles. Wings hyaline, unmarked ex- ^ < 



cept the extreme base and the stigma, which are yellowish. Length 8 mm. t:::^ ^'i/^ 



"North Saugus, Mass. A male specimen collected by. Mr. H. \ *■ 



M. Russell. Type No. 10157, U. S. N. M." (Original description 

 entire.) 



Not represented in our material. 



TEPHROCHIiAHlYS Loew. 



Dorsocentral bristles 3, all behind the suture; humeral 1; pro- 

 pleural 1; notopleural 2; supra-alar 3; scutellar 2 pairs; prescu- 

 tellar 1 pair, modei'ately large; presutural 1; fron to-orbital 2. 

 Third antennal joint a very little elongated, arista bare. Face 

 moderately receding. Cheeks about half the width of the eye, 

 with one or two bristles in the middle, at the end of the row of 

 hairs descending behind the eye. Wings rather elongate and nar- 

 row, with small spines. 



In Becker's part of the Katalog der Paliiarktischen Dipteren, iv, 

 51, the name is spelled Tephrochlaniis ; there appears to be no 

 etymological reason why the original spelling with a y should not 

 be retained. 



TABLE OF SPECIES. 



Scutellum wholly yellow flavitarsis n. sp. 



Scutellum mostly or wholly black in ground color rufiTeiltri!^ Meigen. 



Tepliroclilaniys flavitarsis Darlington, n. sp. 



Length 6 mm. ; of wing 5.6 mm. 



Cheeks yellow; legs entirely yellow; wings brownish; scutellum entirely 

 yellow. 



Head brownish-yellow, occiput brown; front yellowish-brown ; antennae red- 

 dish-brown, third joint large, round; arista brown, bare; vibrissa? one on each 

 side, of medium length ; also one bristle on the middle of each cheek. 



Dorsum of the thorax gray on the middle part, somewhat reddish-gray on the 

 lateral edges; two brown stripes run lengthwise between the dorso-central bris- 

 tles; dorsum densely pubescent, except the lateral edges; scutellum entirely 

 lemon-yellow, bare except the ordinary four bristles. Propleura iind niesopleura 

 brownish, bare except the one propleural bristle; sternopleura reddish-gray, 

 with one strong bristle and a row of smaller hair on the upper edge. 



Abdomen yellow, first segment gray. 



TBANS. AM. ENT. SOC. XXXIV. MABCH, 1908. 



