No. 64] DIPTERA OF CONNECTICUT : TAXONOMY 233 



the lobes. Wings yellowish; stigma dark brown: Aving-tip and a 

 seam on cord darker brown. Abdomen with a broken black dorso- 

 median stripe, with more brownish lateral stripes. 9. L. 13.5-14 

 mm, ; w. 10 . 5 - 12 mm. 



(June, Aug.) 111., Mich. 



N. stigniatica (Dtz.) 



1918, Pachyrhina si'/</matica Dietz; Trans. Amer. Ent. Soc, 44: 137- 

 138, 



Figs. — Dietz, Ibid., pi. 5, fig. 20 (wing), pi. 7, fig. 34 (hyp.). 



Close to hreviorcornis. Flagellar segments not excised beneath. 

 Abdominal tergites with a continuous median brown stripe: lateral 

 stripes usually interrupted. 5 . L. 14 mm.: w. 12.5 mm. 



(Aug.) Pa. 



Prof, Rogers considers that this is either 'b7'eviorcor/ns or extreme- 

 ly close to it. 



N. suturalis (Lw,) 



1803, Pachyrrhina suturalis Loew; Berlin, Ent, Zeitschr,, 7:295, 



Occiput opaque, the brand concolorous, Antennal flagellum bi- 

 colorous, yellow, the bases of segments black. Thoracic stripes ochra- 

 ceous, the suture black. Wings brownish gray; costal and stigmal 

 regions j^ale brown. Abdomen unmarked, 2, L, 10-11 mm,; w. 

 10 - 11 mm. 



S. C, Ga., Fla., Ala., coastal. 



This form, with its synonym costoviarginata Dietz. apparently 

 represents an austral or austroriparian race of ferrugiiiea. 



N. temeraria (Dtz.) 



1918. Pachyrhina temeraria Dietz ; Trans, Amer, Ent, Soc, 44 : 128. 



Fig.— Dickinson, Cfls, Wise, p. 220, fig. 128 (wing) ; 1932. 



Characters as in festina. Antennae (9) entirely pale yellow. 

 Occiput with a narrow brown vitta, 9, L, 17,5 mm,; w, 13 mm. 



(June, July) Mich., Wise. 



Prof. Rogers indicates that this represents, at most, a race of 



gracilicornis. 



N. tenuis (Lw.) 



1863. Pachyr^himi tenuis Loew: Berlin. Ent. Zeitsclir.. 7:297. 



Figs.— Alexander, Cfls. N. Y., 1. pi. 44, fig. 199 (wing) ; 1919. Dickinson, 

 Cfls. Wise, p. 218, fig. 124 (wing) ; 1932. 



Coloration yellow, in life strongly tinged with green. Occiput 

 opaque, immaculate. iVntennae short in both sexes: flagellar seg- 

 ments brownish black, restrictedly yellowish at bases. Thorax opaque. 



