108 NORTH AMERICAN TIPULIDAE 



others, also in many Tipulas, especially the tricolor group, T. 

 rupicola, angustipennis, etc. The setulosity is present on almost 

 all the veins in P. macrophallus and T. oropezoides. I merely 

 mention this character in order that, with more extensive ob- 

 servations, it may furnish means for the separation of species, or 

 groups. 



In concluding these introductory remarks, it is only necessary 

 to state that, separating Nephrotoma as distinct from Pachy- 

 rhina, I have considered the species of the latter under two 

 groups: Pachyrhinae tipuloides, which according to Alexander's 

 „view would be referrable to Tipula, and Pachyrhinae s. s. or typi- 

 cal species of the genus. 



Species with less than nineteen-jointed antennae in the male. 



Pachyrhina Macquart 

 Species with nineteen-jointed antennae in the male. 



Nephrotoma Meigen 



Synoptic Table of Species 16 



1. Vein Sc ends at a distance beyond the origin of Bs, the latter longer. 



Cell M 1 never sessile. 17 Vein Cu and cross- vein m-cu after the 



fork of M Pachyrhinae tipuloides, 2 



Vein Sc ends in close proximity to the origin of Rs, the latter short, 

 oblique or subtransverse. Cell M 1 sessile or petioled veins Cu and 

 cross-vein m-cu at or before the fork of M Pachyrhinae s. 8. 9 



2. Thorax opaque 3 



Thorax shining 6 



3. Fuscous or blackish species 4 



Yellowish species 5 



4. Thorax and abdomen entirely black; legs robust oslari spec. n. 



Pleura and sides of abdomen yellowish-gray; legs slender, hybrida spec. n. 



5. Thoracic stripes margined unimaculata Loew 



Not as in the alternative macrophallus spec. n. 



6. Thoracic stripes black; stigma brown 7 



Thoracic stripes not black; stigma pale 8 



7. Pleura yellow, spotted nobilis Loew 



Pleura grayish-fuscous collaris Loew 



8. Occiput with a median, fuscous line; thoracic stripes ferruginous, not 



margined pachyrhinoides Alexander 



Occiput without line; thoracic stripes gray, margined, puncticollis spec. n. 



9. Color black, markings, if any, yellow or reddish-yellow. . .10 



Not as in the alternative 11 



16 Unless otherwise stated, the types of the species described as new are in 

 the author's collection. 



17 See exception noted in the introduction. Schiner. Fauna Austriaca, ii, 

 p. 503, footnote. 



