DIPTERA— MYCETOPHILIU.E. 593 



Length of body, 4.4""° ; first joint of antennae, 0.2""" ; second joint, 

 0.125"" ; third and fourth joints each, 0.1 1""" ; wings, 4.5"'" ; middle (?) tarsi, 

 2.2"" ; first joint of same, 1.1"" ; second, 0.45"'" ; third, 0.28"" ; fourth, 

 0.2°'"; fifth, 0.17"'"; chiws, 0.038"". 



Fossil Canon, White River, Utah. One specimen (W. Denton). 



BOLETINA Stager. 



BOLETINA SEPULTA. 

 PI. 3, Fig. 9. 



Boletxna sepulta Scudd., Rep. Progr. Geol. Stirv. Can., 1875-1876, 271 (1877). 



A fragment of a single wing and a portion of the abdomen represent 

 this species. It is accompanied b}' Pimpla decessa. The wing is moder- 

 ately broad, and faintly fuliginous ; the costal, auxiliary, and first and 

 second longitudinal veins are heavily impressed, broad, black, and devoid 

 of the microscopic hairs which uniformly cover the membrane of the Aving 

 and the other veins ; these latter are faintly impressed, slender, and testa- 

 ceous. The costal vein is bristly ; the base of the wing is broken, so that 

 only the tip of the auxiliary vein can be seen, which terminates on the costal 

 margin scarcely before the small transverse vein; the latter is conspicuously 

 oblique, directed from above, downward and outward ; the first and second 

 longitudinal veins are pretty stronglv curved downward at tip ; the veins 

 below these fork a little farther out than in the scheme of Boletina, as 

 figured by Winnertz, and the sixth longitudinal vein terminates just beyond 

 the junction of the fourth and fifth longitudinal veins. 



Length of fragment, 3.75""; estimated length of wing, 6""; breadth of 

 wing, 2.15"". 



Quesnel, British Columbia. One specimen, No. d^ (Dr. Gr. M. Dawson, 

 Geological Survey of Canada). 



Boletina umbratica. 



PI. 10, Fig. 3. 



From the size of the abdomen, the single specimen known seems to be 



a female. A fragment of one antenna is preserved together with parts of 



the legs, especially of the tibiae, which are very delicately spined, though 



no apical spurs are seen. The hind tarsi of one side are also preserved 



VOL XIII 38 



