THE CANADIAN ENTOMOLOGIST 195 



beyond the fork of Ri+s+t; Rs short, obljique, almost straight; Ri+s+i variable in 

 length, in one wing shorter than the basal deflection of Cui, in ihc other a little 

 longer; i?2 (the apparent r cross-vein; see Alexander; A New Interpretation of 

 the Wing-venation of the Pediciine Crane-flies, Rnt. News, Vol. 29, pp. 201- 

 205, pi. 12; 1918) inserted at the extreme tip of Ri, perpendicular; cell Mi lack- 

 ing; ceil Jst M-2 open b>- the atroph>- of m; petiole of cell Ms nearly equal to the 

 basal, deflection of Cu\. 



Abdomen dark gra\ish brown, the subterminal segments a liittle darker; 

 hypopygium conspicuously light yellow. 



Habitat.- — Colorado. 



Holotype.— d', Peaceful Valley, Colorado, August 25, 1918, (T. D. A. 

 Cockerell). 



This interesting little fly is to all appearances a Rhaphidolabis of the sub- 

 genus Plectromyia, but the number of antennal segments precludes it from that 

 group, and until more material is available J prefer to consider it a Tricyphona 

 to where it will run by the keys. There are only fifteen distinct antennal seg- 

 ments, but the terminal one is evidently formed by the close approximation 

 of two very small segments. The fly somewhat resembles a very smaU speci- 

 men of Rhapidolahis major Alex., but the size and venation, especialh- the 

 position of Rt and the lack of cell M\, easily separate the two. 



Genus Liogma Osten Sacken. 

 Liogma nodicornis flaveola, new subspecies. 



Male. — ^Length 12 mm.; wing 8.3 mm. 



Female. — Length 11 mm.; wing 9 mm. 



This variety is similar to typical nodicornis, but is much more yellowish 

 throughout. Compared Avith specimens of typical nodicornis, the following 

 difl^erences are apparent: 



Antennae 1/ght brown. Mesonotal praescutum with the ground colour 

 yellowish brown with the three brown stripes rather narrow and scarcely con- 

 fluent; scutal lobes only indistinctly darker; mesonotal postnotum yellowish with 

 only the terminal third blackish. Pleura mostly yellow, a small, circular, dull 

 black area on the mesepisternum behind the fore coxa. The extensive shiny 

 black areas on the mesosternum before the middle coxa are not continuous 

 across the midventral line. Abdomen pale brown. 



Habitat. — ^Virginia. 



Holotype.— d', Great Fall^, Virginia, May 19, 1915. 



Allolopotype.— 9 , June 7, 1915. 



The northern L. nodicornis nodicornis (O. S.) is easily told from the pale 

 yellowish southern race above diagnosed by its much more extensive black 

 thoracic pattern. In the type-material of typical nodicornis, both varieties 

 are represented. As typical of nodicornis in the strict sense the writer selects 

 the lectotype from the material taken in the White Mts., New Hampshire. 



Genus Tipida Linn^us. 



Tipula doaneiana, new name. 



Tipula calif ornica Doane (1912), non Tipida calif ornica (Doane) (1908). 



In 1908, Doane described under the name Pachyrhina californica, a species 

 of crane-fly that both Dr. Dietz and the writer now refer to the pachyrhinoid 

 series of the genus Tipida. Dietz (1918), under the misconception that it was 



