WILLIAM G. DIETZ 123 



Pachyrhina opacivittata spec. n. (PL IV, fig. 9.) 



Similar to P. calinota. Antennal flagellum, except the first joint, blackish. 

 Mesonotal scutum with median, velvety-black stripe. 



Male. Length, 12.5 mm.; wing, 12 mm. 



Head as in P. calinota. Antennae robust, not elongate, scapal joints yel- 

 low, third joint yellowish-brown, following joints blackish, strongly emargi- 

 nate beneath and enlarged at base, with verticel of rather long, black setae, 

 outer joints more elongate, pubescence short, dense and white. Vertex with- 

 out dots; occipital stripe a little wider and shining. 



Thorax as in P. calinota with these differences: Pronotal scutum without 

 median brown spot; dorsal stripes ferruginous, without pruinosity; scutum 

 with median, black, velvety stripe. The dark fuscous spot in upper part of 

 mesopleura not distinct. Halteres and legs as in P. calinota. Wings broad, 

 with fuscous tinge; cell Sc and margin of Cu and Cu 1 brownish; stigma 

 fuscous. Cell 1st M 1 open, veins M and M 3 in part, atrophied. Veins C, 

 Sc, R and veins M 1 . 2 and 3 finely setulose. Venation as in figure. 



Abdomen deep yellow with faint luster, basal half of first tergite brown, a 

 pale brown median line posteriorly tergites, two to four with increasingly 

 larger, fuscous patches, similar patches on tergites five and six, pale brown, 

 seventh tergite tinged with fuscous tergites, eight and nine, yellowish brown, 

 a broad, dark brown lateral stripe, less marked on segments seven and eight. 

 Hypopygium similar to that of P. calinota, but the inner appendages do not 

 protrude beyond the upper appendages. 



Holotype: cf ; Aweme, Manitoba, Canada. (E. Criddle.) 

 Although very closely resembling P. calinota, this species is 

 distinguished at once by its very stout antennae, blackish flagel- 

 lum, the segments of which are deeply emarginate beneath, 

 the velvety-black vitta of the mesonotal scutum, the subopaque 

 abdomen with broad, lateral stripes. Cell 1st M 2 wide open, 

 is certainly anomalous, but, although recorded also in Tipula 

 imperfecta Alexander 21 and Tipula alia, Doane, 22 no specific value 

 should be attached to it. 



Pachyrhina montana spec. n. (PL IV, fig. 8.) 



Allied to P. calinota. Frontal prolongation with ferruginous stripe. An- 

 tennae, except the first joint, dark brown. Occiput with triangular shining 

 spot. Pleura conspicuously spotted and abdominal tergites banded with 

 dark brown. 



Female. Length, 15.5 mm.; wing, 13 mm. 



Head yellow. Frontal prolongation shining, with ferruginous median stripe 

 extending to end of nasus, the latter beset with blackish hairs; mouth parts 

 and palpi concolorous, the latter slightly brownish, the last joint shorter than 



21 Proceedings Acad. Nat. Sciences, Philadelphia, 1915, p. 484, pi. xvi, fig. 9. 



22 Annals of the Entom. Society of America, v, p. 44, (1912). 



TRANS. AM. ENT. SOC, XLIV. 



