578 TERTIAEY INSECTS OF NORTH AMERICA. 



great cross-vein, so that its apical portion and the sixth longitudinal vein 

 converge rapidly. The tip of the wing is decidedly below the middle. 



Length of body, 12.75°"°; of wing, 14.5"""; breadth of same, 3.5""". 



Green River, Wyoming, Three specimens, Nos. 15 and 74, 42, 43 

 and 44 (Dr. A. S. Packard). 



TiPULA SEPULCHRI. 

 PI. 10, Fig. 1. 



A single specimen is preserved, showing a nearly complete wing 

 (imperfect at the base), parts of the body, with tlie head and palpi and 

 parts of the antennae. The antennas are similar to those of T. spoliata, and 

 the palpi of similar form and clothing but slenderer. The wing is slightly 

 larger than in T. spoliata, with a distinct subtriangular stigma, but with no 

 other marking about the dusky veins. Tlie stigmatal cell has its lower 

 bordering vein bent some way beyond the middle, and the cell is long and 

 slender, fully eight times longer than broad, the third longitudinal vein 

 arising from the second much earlier than in T. spoliata, considerably 

 before the lower end of the great cross-vein. The discal cell is about lialf 

 as long again as broad, its lower inner angle much more than a right angle; 

 the fifth longitudinal vein is scarcelv bent where it strikes the s^reat cross- 

 vein, and its apical portion therefore scarcely converges with the sixth lon- 

 gitudinal vein. The tip of the wing is only a little below the middle of the 

 wing. 



Length of wing, 15°""; breadth, 3.75"'°'. 



Green River, Wyoming. One specimen, No. 9 (Dr. A. S. Packard). 



Family CHlRONOMID^e Westwood. 



CHIRONOMUS Meigen. 



Chironomus septus. 



PL 10, Fig. 8. 



A single specimen in which the wings are imperfectly preserved, being 

 obscured by the abdomen, over which they are folded Tlie antennfB are 

 hidden. The body is preserved on a partially lateral view and has an 

 S-shaped form, the head being closely appressed to the lower front of the 

 thorax, which is elevated behind the middle, and the abdomen curved 



