256 NORTH AMERICAN FAUNA. [No. 7. 



and all the tarsi, save tlieir tip yellow. Hind femora without bristles below. Wings 

 hyaline; last section of the fourth vein sinuous, the three outer sections of the same 

 vein of nearly equal length. Small cross vein much beyond the tip of the auxiliary 

 vein. Length 3 mm . 



One specimen, Argus Mountain, California, April, 1891. Is most nearly allied to P. 

 flavitarsis Will., but differs in the color of the abdomen, and the more produced third 

 joint of the antennae. 

 Blepharopeza adusta Loew. Centur. x, 67. 



A single specimen from Sonoma County, Calif. (Riley), agreeing well with the de- 

 scription, save that all the tibiae are reddish. 

 Prospherysa similis n. sp. 



Male. — Front somewhat narrowed behind; frontal stripe dark brown, on each side 

 a single row of bristles descending below the base of the third antennal joint. 

 Sides of the face and the cheeks wholly without bristles. Antennae black; third 

 joint four or five times the length of the second joint, not reaching the vibrissae; 

 arista thickened to about the middle. Face and sides of the front yellowish gray, 

 a darker spot on the lower part of the cheeks. Palpi yellow, thorax black, lightly 

 dusted, with three linear, darker stripes, scarcely visible behind. . Tip of scutellum 

 red, with four marginal bristles on each side, a small, medium, decussate pair and 

 two small, subdiscal ones. Abdomen somewhat elongate ; first segment only a little 

 shorter than the second; all the segments marmorate with white; first and second 

 segments each with a pair of marginal bristles, the third segment with six before the 

 hind margin, the fourth segment with a subdiscal pair and numerous ones near the 

 margin; hypopygium, red. Thorax, abdomen, and legs clothed with long and abun- 

 dant black hair. Legs, deep black; pul villi and claws elongate, the former light 

 yellow, the latter yellowish ; front tibiae with a row of short bristles on the outer 

 side; middle tibiae with two or three median stout bristles; hind tibiae with numer- 

 ous bristles, of which two are longer than the rest. Tegulae, white. Wings, grayish 

 hyaline; the small cross vein situated a little before the middle of the discal cell. 

 Length 13 mm . 



Female. — Front broader, about one-third of the width of the head ; a pair of orbital 

 bristles present ; hair of thorax and abdomen less abundant, and that of the abdomen 

 more recumbent and bristly; claws and pul villi not elongate. Length, 10 mm . 



Two specimens, Sonoma County, Calif. The female bears the label " Clisiocampa," 

 sp. The species is nearest allied to P. apicalis v. d. Wulp, where it is clearly brought 

 by Wulp's table. It will be distinguished from P. promiscua Towns., as also P. 

 websteri Towns., by the bare eyes, as well as other characters. 

 Prospherysa sp. 



A single male specimen from Alameda County, Calif. (Riley), seems to agree well 

 with P. plagiodes v. d. Wulp in its neurational characters, but has the third vein 

 bristly for a short distance only. 

 Melanodexia gen. no v. 



Eyes of male separated above by the ocellar prominence; front in the female very 

 broad. Bristles of the front numerous and hair- like in the male; in the female 

 shorter, fewer, and stouter; not descending below the base of the antennae. Eyes 

 bare. Second joint of the antennae somewhat swollen, the third joint not three 

 times the length of the second; arista short plumose. Sides of face and the cheeks 

 hairy. Vibrissal ridges nearly parallel; vibrissae slender, situated a considerable 

 distance above the oral margin, the epistoma not projecting. Bottom of the facial 

 groove only gently convex. Width of the cheeks less than one-half of the greater 

 diameter of the eyes. Proboscis short, palpi slender. Thorax and scutellum with 

 well developed bristles. Abdomen short-conical, without distinct macrochaetae, save 

 on the distal part; in the male, with abundant erect hair on the anterior segments, 

 and thin bristles posteriorly; in the female, with short recumbent bristles anteriorly, 



