6oO CALIFORNIA ACADEMY OF SCIENCES. 



basal half and with grayish hair, chiefly on first to third 

 segments, the dorsum of segments blackish. Second 

 and third segments, especially in the female, more or less 

 faintly reddish on sides, other segments more broadly and 

 distinctly so, the black of dorsum of segments being well 

 defined and widening posteriorly. The red is often in- 

 distinct and more or less absorbed in the male. Hypo- 

 pygium a little elongate, ovipositor not large. Legs red- 

 dish, with a quite even black tinge on the outer surface. 

 Macrochaitai black, pulvilli yellowish. Wings very faintly 

 and evenly tinged with smoky. 



22. Proctacanthus zamon n. sp. 



San Jose del Cabo, Baja California (Eisen). Twenty 

 females and thirty-seven males. 



S ? . Length, 21 to 27 mm. A stout species with 

 large thorax. Head blackish, front with black hair; face 

 more yellowish, with long pale yellow beard, extending 

 on the cheeks. First antennal joint black; second and 

 third brown, subequal, shorter than first, style longer than 

 antennae. Thorax soft brownish black, with an indistinct 

 pair of median vittaj, having a narrow reddish line be- 

 tween them anteriorly which may extend to scutellum. 

 A reddish line extending' inward on suture from root of 

 wings, and a line outside median vitt^e posteriorly. A 

 whitish spot inside the humeri. Humeri, edges of thor- 

 acic dorsum, and the scutellum brown, the latter with 

 bristly black hair, hind margins of thorax with black ma- 

 crochsetae. First two abdominal segments blackish with 

 blackish pile, the second usually with a yellow hind mar- 

 gin; rest of abdomen yellow, with yellow pile which is 

 chiefly on third and fourth segments. Some yellow pile 

 on hind margin of second segment in both sexes Ter- 

 minal segments with a deeper yellow tinge. Abdomen 

 tapering in both sexes, more so in female, ovipositor rather 



