178 ENTOMOLOGICAL NEWS. [April, '08 



knobs brownish ; femora and base of tibise brownish-yellow, tibiae grow- 

 ing darker toward the tip ; tarsi brown, terminal segments almost 

 black; abdomen brownish-yellow, darker posteriorly, posterior and 

 lateral margins of the segments but slightly darker ; the eighth stern- 

 ite of the male long, broad, conspicuous, the posterior margin with a 

 rather deep rounded incision, the edges of which bear a conspicuous 

 fringe of long yellow hair; posterior margin of the ninth tergite with 

 a small V-shaped incision, the edges of which are black; ovipositor 

 reddish-yellow, upper valves straight, tips rounded, lower valves not 

 reaching the tips of the upper valves ; wings hyaline ; stigma brown, 

 more or less distinct; second posterior cell sessile or with a very 

 short petiole (in two of my specimens this cell is broadly sessile in 

 one wing, and with a very short petiole in the other wing). Length, 

 male, 11 mm., wing, 11 mm.; female, 15 mm., wing, 15 mm. 



Hab. — Central and Southern California, Montana, Eastern 

 and Western Washington, Nevada, Arizona, (type from Stan- 

 ford University, Cal.) Many males and females. 



This species is very like P. ferruginea of the eastern United 

 States and doubtless is the one that has been recorded from 

 California as ferruginea. The long, broad eighth sternite of 

 the male with its deeply cleft, long-haired posterior margin 

 at once separates it from ferruginea in which this sternite is 

 only slightly curved or cleft along the posterior margin and is 

 provided with much shorter sparser hairs. The specimens 

 from Arizona and one of the Washington specimens have the 

 anterior lateral margins of the median thoracic stripe bor- 

 dered with brown and in some the anterior ends of the lateral 

 stripes are also marked with brown. The brown spot on the 

 occiput is sometimes quite indistinct, in other specimens it is 

 well marked, sometimes drawn out into a narrow line anter- 

 iorly. In a few of the specimens the tip of the knob of the 

 halteres is yellowish. The palpi are sometimes wholly yellow 

 and the 4th, 5th, 6th segments of the antennae of the female 

 are usually more or less yellow. 



Pach.yrb.ina breviorcornis n. sp. 



Yellow; head yellow, with a brownish tinge and a small triangular 

 brown spot above, lighter behind the eyes; rostrum yellow, brown on 

 the sides ; palpi yellow ; antennae with thirteen segments, first and sec- 

 ond wholly yellow, third elongate, basal half yellow, distal half brown, 



