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. macrophaUus 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 Tipida, and Pachyrhinae s. s. or typi- 

 cal species of the genus. 



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



Pochyrhina ^Vlacquart 

 Species with nineteen-jointed antennae in the male. 



Nephrotoma Meigen 



Synoptic Table of Species ^® 



1. Vein Sc ends at adistance beyond the origin of Rs, the latter longer. 



Cell M' never sessile.'^ 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 subtrans verse. Cell M' sessile or petioled veins Cu and 

 cross-vein m-cu at or before the fork of M Pachyrhinae s. s. 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 macrophaUus 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 strijies ferruginous, not 



margined pachyrhinoides Alexander 



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



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



Not as in the alternative 11 



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

 the author's collection. 



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

 p. 503, footnote. 



