30 S. W. WILLISTON, M. D. 



Two specimens, Washington Territory (H. K. Morrison). 

 One of the specimens has on the inner side of the front femora some 

 whitish pile. 



56. liapliria vivax n. sp. 



'^ . — Black, shining; pile of the face, front, beard, humeri, scutellum, pleurae, 

 posterior angles of the abdominal segments, coxae, front and middle tibiae light 

 yellow. Length 22 mm. 



Face thickly clothed with light yellow pile, on the lower angles black ; protrud- 

 ing through the yellow pile a number of black bristles. The first two joints 

 of the antennae with black pile ; the second joint scarcely half as long as the 

 first. Beard and pile of the proboscis light yellow; on the upper part of the oc- 

 ciput, and the bristles of the ocelli, black. Dorsum of thorax with a distinct blue 

 reflection, clothed with short black pile, longer behind; in the front, the post alar 

 callosities and a thin row in front of the scutellum light yellow. Scutellum with 

 yellow pile and yellow and black bristles along its border. Pleurae with a tuft of 

 yellow pile in front of the root of the wings; the fan-like row of hairs in front of 

 the halteres light yellow. Abdomen shining black, with very short black pile, 

 and longer dense light yellow pile as follows: the posterior angles of the third 

 segment and on the following segments, successively extending more inward along 

 the hind margin ; on the seventh it forms a complete cross-band in front of the 

 hypopygium; on the sides of the second segment in front, reaching nearly across, 

 and succeessively less on the following segments, with less dense, more erect yellow 

 pile; pile of the hypopygium black. Legs black pilose; the front and middle 

 tibiae on their outer side with yellow pile, a trace of which is found on the hind 

 tibiae. Wings nearly hyaline toward the base, lightly clouded with brownish on 

 outer part. 



One specimen, Washington Territory, (H. K. Morrison). 



57. Liaphria bilineata Walker, List, etc., ii. 



% 9 • — Black ; black pilose ; posterior occiput below, pleurae, legs and sides of 

 abdomen with long silky white pile; dorsum of thorax but little shining, in front 

 with three darker opaque stripes, the middle one more or less obsolete ; 3-7 seg- 

 ments of abdomen, except the sides, yellowish-red, with similar colored jDile ; facial 

 gibbosity large. Length 15-20 mm. 



Facial gibbosity large, globose ; pile and bristles of the head wholly black, ex- 

 cept on the occiput below, where it is long, abundant and silky white. Dorsum of 

 thorax nearly opaque, with two rather distinct, narrow, median, more opaque 

 brown stripes ; obsolete posteriorly, between them there is a third, more obsolete, 

 but of which the anterior end is usually quite apparent. Pile of dorsum rather 

 short, erect, not abundant, black. Pleurae grayish poUinose, with sparse, silky 

 white pile ; the fan-like row of hairs in front of the halteres, black. Abdomen 

 black, moderately shining ; a very large oval spot reaching from near the begin- 

 ning of the third segment to the tip or h^^popygium, and broadly separated from 

 the lateral margins, yellowish-red, with appressed, similar colored pile. On the 

 black portion the pile is black, short; on the sides in front long, silky white. Legs 

 black; the femora in large part, and more or less of the tibiae with silky white 

 pile. Wings brownish along the veins ; the inner parts of the cells and the base 

 of the wings more hyaline. 



the wmgs more hyaime. 



Ten specimens, N. CaUfornia (0. T. Baron). 



