No. 64] DIPTERA OF CONNECTICUT : TAXONOMY 231 



a median brown vitta and less evident lateral streaks. 9. L. lH-15 

 mm.; w. 18 - 14 mm, 



(June. July; Sept.) Alta., Sask., Out., Que., N. B., Mich. (Hudsonian, high 

 Canadian). 



N. opacivittata (Dtz.) 



1918. Fachi/rhina opacivittata Dietz; Trans. Amer. Ent. Soc, 44: 123. 



Fig. — Dietz, Ibid., pi. 4. fig. 9 (wing). 



Close to calinota. Posterior vertex unmarked. Flagellar seg- 

 ments relatively stout and moderately incised. Praescutal stripes 

 reddish brown, the median one behind divided by a narrow black 

 vitta. ,$ . L. 12 - 12.5 mm. ; w. 11 - 12 mm. 



(Aug.) Mass., Wise, Man. 



N. pedunculata (liW.) 



1863. Pachyrrhina pedunculata Loew ; Berlin. Ent. Zeitschr., 7 : 293. 



Figs. — Snodgrass, Trans. Amer. Ent. Soc, 30, pi. 11, figs. 58, 59 (hyp.) ; 

 1904. Alexander, Cfls. N. Y., 1, pi. 44, fig. 205 (wing) ; 1919. Dickinson, Cfls. 

 Wise, p. 217, fig. 121 (wing) ; 1932. 



Yellow with black markings. A small black spot between bases 

 of antennae. Wings almost uniformly subhyaline; stigma and very 

 narrow apex darker. ^ . L. 12-13 mm. ; w. 12 - 13 mm. ? . L. 16-18 

 mm. ; w\ 12 - 14 mm. 



(Late May-early Aug.) Ont., Que., N. B., N. S., Me., N. H., Vt., Mass., N. Y., 

 Pa., westw. to Wise, 111., and Minn. (Canadian). 



Connecticut. — Reported from Connecticut by the Experiment Station, without more 

 accurate data. 



N. penumbra Alex. 



1915. Nephrotoma penmribra Alexander: Proc. Acad. Nat. Sci. Phila- 

 delphia, 1915 : 467-468. 



Figs.— Alexander, Ibid., pi. 16, fig. 1 (wing) ; Cfls. N. Y., 1, pi. 44, fig. 205 

 (wing) ; 1919. 



Coloration obscure yellow, variegated by black or brownish black. 

 Frontal prolongation of head trivittate with dark brown. Antennal 

 flagellum black ; flagellar segments strongly incised. Dark markings 

 on vertex and occiput broad, especially at anterior end. Abdomen 

 with middorsal black stripe. $. L. 12-13.5 mm.; w. 12-13.5 mm. 

 5. L. 16-18 mm.; w. 14-15 mm. 



(July) N. B., N. H.; alpine and subalpine portions of Mt. Washington, 4000-6290 

 ft. (Hudsonian). 



N. perdita (Dtz.) 



1918. Pachyrhina perdita Dietz; Trans. Amer. Ent. Soc, 44:116- 

 117. 



Fig.— Dickinson, Cfls. Wise, p. 217, fig. 120 (wing) ; 1932. 



