444 KANSAS UNIVERSITY SCJENCE BULLETIN, 



Psilocephala lateralis, n. sp. 



Male: Head black, front shiniug, except the lower corners, 

 which are white pollinose, face white pollinose, antenna* black, 

 third joint with a faint reddish cast at base, first and second 

 with black bristles, first and third subequal in length, third 

 broader at middle than at ends, arista small and acute, mouth- 

 parts black, pile of palpi white, at junction of face and cheeks 

 is a deep black spot, bearing short black pile, cheeks and oc- 

 ciput white pollinose, the former with abundant white pile, 

 bristles of latter black. Thorax black, dorsum of mesonotum 

 and scutellum grayish brown pollinose, except broadly on sides, 

 which are shining, pile yellowish white, bristles black, the lat- 

 ter four in number on the scutellum, pleurae white pollinose 

 and pilose, halteres lemon yellow. Abdomen black, shining, 

 the first segment abundantly white pollinose, and pilose, like- 

 wise the apices of the second and third segments, viewed from 

 in front, the dorsum of all segments solid sericeous, which is 

 scarcely visible from rear view, venter with the first and tip 

 of second and third segments white pollinose, all segments 

 sparsely white pilose, tip of hypopygium with a yellowish cast. 

 Legs black, pile white, bristles black, coxa? white pollinose, 

 middle and hind tibise and tarsi reddish yellow. Wings with a 

 yellowish brown tinge, darkest on the anterior half, the fourth 

 posterior cell closed and short petiolate. Length, 7 mm. 



One specimen; Bill Williams Fork, Arizona. Collected by 

 Dr. F. H. Snow. 



Thereva anomala, n. ep. 



Male : Head and members black, front shining, in certain 

 lights a sprinkling of white pollen can be detected along sides, 

 face, cheeks, and occiput white pollinose, pile of vertex, front, 

 face and mouth-parts black, of cheeks and occiput white, bris- 

 tles of latter and of first joint of antennae black, first and third 

 joint of antennae subequal in length, either about four times as 

 long as the second. Thorax black, mesonotum gray pollinose, 

 except broadly on sides which are shining, and with a mid-dor- 

 sal line velvety black, pile and bristles black, scutellum gray 

 pollinose, with four black bristles and rather numerous black 

 pile, pluerae with a thin coating of white pollen, pile white, a 

 rather prominent tuft of white pile before base of halteres, lat- 



