190 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [BulL 



I am interpreting this species in accordance with Edwards' com- 

 parison of the type male with maciiUpennis, this implying dark sub- 

 terminal rings on femora and a darkened cloud in outer radial cells, 

 as in maculipennis. The fly differs from both fernaldi and maciiUpen- 

 nis in the dimidiate abdominal tergites. $. L. about 5 mm.; w. 5 

 mm. 



(Oct., Nov.) N. S., Me., Mass., Ct., N. Y. 

 Connecticut. — without closer data (C. W. J.). 



Dickinson (Cfls. Wise, p. 173, fig. 41; 1932) reports this fly from 

 Wisconsin in October. From his figure of the wing it is apparent 

 that there is a mis-determination and the species in question is pos- 

 sibly either garretti or regelationis. 



Cu, M4 



Figure 20. Trichocera garretti Alex. ; venation. 

 Symbols: A, Anal; Cu, Cubitus; M, Media; R, Radius; 6"^ Subcosta. 



T. fernaldi Alex. 



1927. THchocera fernaldi Alexander; Can. Ent., 59: 70-71. 



Figs.— Alexander, Ibid., 59: 70, figs. 1, 2 (ven.). 



Praescutal stripes four, the lateral pair subobsolete. Knobs of 

 halteres dark brown. Dististyle of male hypopygium without basal 

 tubercle. $ . L. 4.5-5 mm. ; w. 6.5-7 mm. 



(Oct., Nov.) Mass., Ct., westw. to Mich. 



Connecticut.— New Haven, Oct. 31, 1903 (H.L.V.) ; Shelton, Nov. 14, 1932 (J.P.J.) ; 

 Yalesville, Oct. 19, 1903 (H.L.V.) . 



T. garretti Alex. (Fig. 20). 



1927. Trichocera garretti Alexander; Can. Ent., 59 : 71-72. 



Mesonotum brownish black, without markings. Male hypopyg- 

 ium with the basal two-fifths of dististyle enlarged, on me'sal face 

 expanded into a flattened ear-like lobe. $. L. 4-4.5 mm.; w. 6-6.5 

 mm. 



(Mar.-May) Mass., westw. to B. C 



T. maculipennis Meig. 



1818. Trichocera maculipennis Meigen; Syst. Beschreib., 1:214. 

 Fig.— De Meijere, Tijdschr. v. Ent., 64 : 88, fig. 128 (hyp.) ; 1921. 



