310 CALIFORNIA ACADEMY OF SCIEXCES [Proc. 4th Ser. 



Type, Gallatin County, Mont., July 19, 1911, in collection of 

 Montana Agricultural Experiment Station. Paratype, Boze- 

 man, Mont., July 25, 1915. 



14. Eremomyia major, new species 



Male. — Black, distinctly shining, slightly gray pruinescent. 

 Head black; interfrontalia, second antennal joint, parafacial 

 adjacent to vibrissa, and bases of palpi rufous ; orbits face and 

 cheeks with white pruinescence ; thorax with five black vittge; 

 abdomen without well defined markings, the dorso-central 

 vitta hardly traceable; legs black, extreme apices of femora 

 and all of tibise rufous ; wings grayish, veins brown, a faint 

 brown tinge along outer cross-vein and near base of wings; 

 calyptra yellow; halteres brownish yellow. 



Eyes separated at narrowest part of frons by a distance 

 equal to about twice the width across posterior ocelli; orbital 

 bristles strong, extending almost to anterior ocellus, a few 

 weak hairs laterad of the bristles anteriorly; parafacial about 

 1.5 as wide as third antennal joint and nearly two-thirds as 

 wide as height of cheek; antennae not extending to mouth- 

 margin, third joint about 1.5 as long as second, rounded at 

 apex, second transverse at apex on inner side, its surface 

 granulose, a few punctures along inner side near apex; arista 

 almost bare, moderately swollen on basal fifth ; vibrissal angle 

 with about 20 closely placed bristles of moderate length. 

 Thorax with three pairs of long presutural acrostichals ; both 

 posthumeral bristles long and strong, close together; prealar 

 very long, sternopleura with three or more posterior bristles. 

 Abdomen cylindrical, sixth tergite with long bristles ; basal 

 hypopygial segment with long hairs but no long bristles ; fifth 

 sternite with some short hairs on apical half of inner margin 

 of each process and a number of strong bristles on outer 

 portion of each. Fore tibia with an antero-dorsal bristle about 

 one-fifth from apex, one postero-ventral bristle a little basad 

 of it, and sometimes a stronger one just distad of middle; 

 mid-tibia with one antero-dorsal, one postero-dorsal, and three 

 or four posterior bristles ; hind femur with a complete antero- 

 ventral and a partial postero-ventral series of bristles; hind 

 tibia with two antero-ventral, two antero-dorsal, and two 



