186 PROCEEDINGS OF THE ACADEMY OF [Oct., 



9 . Yellow, with black as follows: Spot on ocelli, frons medianly, 

 tip of third antennal joint, proboscis, three broad, more or less coa- 

 lescing mesonotal stripes, the lateral ones abbreviated anteriorly and 

 somewhat interrupted at suture, the median one abbreviated pos- 

 teriorly also, spot on mesopleura, sternopleura and on hypopleura, 

 and apices of tarsi. Wings hyaUne. Pile sparse, short and pale. 

 Head much broader than long. Vertex one-third ^vidth of head. 

 Proboscis extending twdce length of head; palpi a little beyond epi- 

 stoma. Costal length between second and fork of third three times 

 that between firet and second; anterior cross vein far beyond 

 middle of discal cell. Length, 3.5 mm. 



Type.— Redlands, California, 1912, [F. R. Cole Coll.]. 



In some specimens the frons may prove to be dark medianly and 

 the abdomen shows dark bases to segments. 



Lordotus divisus new species. 



Distinguished from all known species by the entirely black pile 

 on the thorax and abdomen. 



cT. Black; knob of halteres and squamae whitish yellow. Wings 

 clear; veins yellow; antecostal cell black. All pile black, becoming 

 brownish on scutellum. Cilia of squamae alaris white, of squamae 

 thoracalis brown. First antennal joint nearly as long as third; 

 second not longer than broad. Proboscis extending in length equal 

 to that of head and thorax together; palpi as far as second antennal 

 joint. Length, 6-8 mm. 



Type. — cf ; Alamogordo, New Mexico, April 30, 1902, (Viereck), 

 [A. N. S. P. No. 6215]. 



Heterostylum vierecki new species. 



Differing from robustum 0. S., in having the scutellum black, and 

 the pile of the second abdominal segment wholly black. Differing 

 from sackeni Will., in having the facial pile white. 



cf. Black; face, halteres, fourth and fifth abdominal segments 

 excepting a medial stripe, fore and middle tibiae, pale. Wings 

 entirely brown, becoming diluted along inferior margin. Pile black 

 on ocellar tubercle, frons, first antennal joint, scutellum in part, all on 

 second, sixth and genital segments, third except basal row, medially 

 on segments 4-5, and most of venter. White on face, occiput, pleura, 

 first abdominal segment. Yellow on mesonotum, scutellum in part, 

 and remainder of abdomen, but on latter mixed with white. No bristles 

 except the red ones at roots of wings. Opaque. Frons, face, first 



