438 CONNECTICUT GEOL. AND NAT, HIST. SURVEY [Bllll. 



G. {Idiocera) blanda O. 8. (Fi^^s. 47. 1 ; 49. D) . 

 1859. Gonomyia hlanda Osten Sacken, Proc. Acad. Xat. Sci. Phil- 

 adelphia, 1859 : 231. 



Figs. — Osten Sacken, Mon. Dipt. N. Amer., 4, p). -1, iig. 17 (hvp.) ; 1869. Need- 

 ham, 23rd Rept. N. Y. St. Ent. for 1907, pi. 24. ng. .5 (wing); 1908. Alexander. 

 Proc. Acad. Nat. Sci. Philadelphia, pi. 26, fig. 24 (wing), pi. 29. figs. 08.69 (hyp.); 

 1916. Alexander, Cfls. N. Y., 1, pi. 36, fig. 90 (wing) ; 1919. Dickinson, Cfls. Wise, 

 p. 196, fig. 82 (wing) ; 1932. 



Mesonotuni <rrayish brown, the pleura more yellowish. Femora 

 conspicuously darkened at tips. Wings (Fig. 47.1). Male hypopyg- 

 iuin (Fig. 49. D). i. L. 4.2-4.5 mm.; w. 5.5 nun. $. L. 5.5-0 mm.; 

 w. 6-7 mm. 



(June. July) Ont., Que., N. S., N. H., Vt., Mass., N. Y., we.stw. to Mich., Wise, 

 and Mo., southw. to S. C, Ga. and n. Fla. 



Connecticut— East River, July 16-20, 1910 (Ely). 



G. {Idiocera) gaigei Kog. (Fig. 49, E). 



1931. Gonomi/ia {Ptilostena) gaiqei Kogers; Pub. Univ. Oklahoma 

 Biol. Surv., 3 : 333-335. 



Very close to hlanda but distinct in the details of structure of the 

 male hypopygium (Fig. 49, E). Vein >S'c short. 



(June) Okla. 



G. {Idiocera) mathesoni Alex. (Fig. 49, F). 



1915. Gonoiiuiia {Gonomyia) mathesoni Alexander; Ent. News. 26: 

 170-172. 



Figs. — Alexander, Ibid., 26:171, fig. 1 (wing), 2, 3 (hyp.); 1915. Alexander, 



Proc. Acad. Nat. Sci. Philadelphia, 518, pi. 26, fig. IZ (wing) ; 1916. Alexander, 



Cfls. N. Y., 1, pi. 36, fig. 89 (wing) ; 1919. Dickinson, Cfls. Wise, p. 196, fig. 81 

 (wing) ; 1932. 



General coloration yellow, the praescutum indistinctly striped 

 with reddish brown. Pleura white, striped longitudinally with red- 

 dish brown. Wings subhyaline. the stigma barely indicated, veins 

 i?i+2 and R^ approximated at margin. Abdominal tergites dark 

 brown, the caudal margins narrowly yellow. Male hypopygium (Fig. 

 49, F). $. L. 5-5.4 mm.; w. 6-6.5 mm. 9. L. 6.5-7 mm.; w. 6.2-7 

 mm. 



(June-Aug.) N. S.. N. H., Vt., Alass., Ct. and N. Y., westw. to Wise, Mo. and 

 la., southw. to N. C. 



Connecticut.— Kent Falls, July 23-24, 1931 (C. P. A.); W. Granbv, June 8. 1929 

 (C. P. A.). 



Subgenus Gonomyia Meigen 



Key to Species 

 (Based chiefly on male characters) 



1. Wings with cell 1st M- open by atrophy of basal section of Ma {coinuitella 



group) 2 



Wings with cell 1st Ah closed (Fig. 47, J, K) 6 



