46 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Seven males and one female from Monterey and San 

 Diego, Calif. 



The male of this species is distinguished by the pro- 

 nounced notch in the third antennal joint and the very dis- 

 tinctly dorsal insertion of the arista. 



46. Parasyntormon montivagum, sp. nov. 

 Plate III, Fig. 74. 



Male. Length 2.25-3.25 mm.; length of wing 2.5-3 "^i"- Proboscis and 

 palpi piceous. Face very narrow, the eyes almost meeting. Antennae large ; 

 first joint long, without hairs, with a prominent ventral projection, yellow 

 below, black along its dorsal surface; second and third joints piceous, second 

 overlapping the third on the inner side with a broad thumb-shaped lobe; 

 third joint large, covered with delicate pile, with a blunt tip and a faint inden- 

 tation in its convex ventral contour; dorsal contour nearly straight; arista 

 very long, with very short pubescence, inserted half-way between the base 

 and the apex of the third joint. Front black, covered with grayish dust. 

 Postocular cilia sparse, pale below. Thorax and scutellum dull metallic 

 green, covered with grayish dust. Abdomen club-shaped, laterally com- 

 pressed; second, third and fourth segments yellow, with their posterior edges 

 blackened, and in some specimens with a black mid-dorsal line; venter yel- 

 low; first, fifth and sixth segments and hypopygium coppery black. Hypopyg- 

 ium like that of the other species of the genus. Pleurae dull metallic green, 

 covered with pale dust. Coxae yellow, middle pair with a narrow black 

 streak on their outer surfaces; anterior surfaces of fore coxae with black hairs. 

 Legs yellow, tarsi infuscated on the fourth and fifth joints; fore tarsi resem- 

 bling those of other species of the genus ; first joint slender, bearing three black 

 bristles in a row on the plantar surface near the proximal end ; second joint 

 short, distinctly incrassated; third joint with a short, somewhat recurved 

 spur-like bristle on the inner side near the proximal end. Wings grayish 

 hyaline, distinctly narrowed towards the base. Venation as in other species 

 of the genus; the posterior cross-vein being about one-third as long as the 

 distal segment of the fifth vein. Halteres and tegulae pale yellow, the latter 

 with white cilia. 



Female. Length 2.5-3 mm-; length of wing 2.5-3 rnm. Face much 

 broader than that of the male, covered with gray dust. Antennae smaller; 

 second joint with a short, blunt, overlapping process; third joint scarcely 

 longer than broad, somewhat spade-shaped; arista short, inserted dorsally. 

 Abdomen colored like that of the male. Wings not narrowed towards the 

 base, with rather a prominent anal angle. Legs plain, tarsi somewhat more 

 infuscated than they are in the male. 



