April, '08] ENTOMOLOGICAL NEWS. 177 



broad black shining band on the occiput and the vertex attenuated 

 anteriorly ; a small indistinct reddish-brown spot above each eye ; ros- 

 trum yellow with a brown spot on each side close to the base ; palpi 

 brownish, lighter at the joints; first two segments of the antennae 

 yellow, others wholly brownish-black, middle segments slightly excised 

 below ; thorax sulphur yellow ; dorsal stripes black, shining, the median 

 one slightly dilated anteriorly; collare orange-yellow in the middle, 

 blackish or brownish on the sides; a small back dash in the dorsal- 

 pleural membrane just before the base of the wing; pleura sulphur- 

 yellow, variegated with one or two reddish-yellow spots ; scutellum 

 reddish-brown ; metanotum yellow with a faint reddish-brown spot 

 posteriorly; halteres brownish-yellow, darker toward the tip; coxae 

 and base of femora light yellow ; femora and tibia brownish-yellow, 

 black at the tips ; tarsi black ; abdomen yellow with dorsal, lateral and 

 ventral, interrupted black stripes; eighth and ninth tergites of male 

 wholly black ; eighth sternite black, the posterior angles and a narrow 

 border of the deep V-shaped incision yellowish, posterior angles bear- 

 ing a few yellow hairs of moderate length ; appendages of the hy- 

 popygium yellow ; eighth segment of female black, ovipositor reddish- 

 yellow, upper valves long, slender, very slightly decurved at the tip, 

 lower valves not reaching to the tip of the upper valves ; wings hya- 

 line ; costal and subcostal cells with a slight yellowish tinge; stigma 

 brown ; second posterior cell sessile. Length, male 13 mm., wing 13 

 mm., female, 14 mm., wing 13 mm. 



Hab. Wyoming. One male, one female. 



Much like P. vittula Lw. but may be distinguished by the 

 fewer lighter markings on the pleura and particularly by the 

 deep V-shaped incision on the posterior margin of the eighth 

 sternite of the male. 



Pachyrhina occidentalis n. sp. 



Yellow ; head opaque, orange-yellow above, much lighter yellow be- 

 hind the eyes and below; occiput with an arrow-shaped brownish spot; 

 rostrum, palpi and first three segments of antennae orange-yellow, re- 

 maining segments of antennae dark brown ; palpi darker toward the 

 tip; thorax light yellow, dorsal stripes brownish-yellow or reddish- 

 yellow, broad, shining, the lateral ones expanding somewhat anter- 

 iorly; the sides of the collare, the coxae and irregular spots on the 

 pleura, brownish or reddish-yellow; thoracic suture marked tvith black 

 at both ends and with a black spot in the middle; three black spots 

 along the dorso-pleunil membrane, the first just back of the collare, 

 the second a short distance in front of the wing and the third at the 

 base of the wing; scutellum and metanotum with a broad, reddish- 

 yellow stripe; halteres yellowish at the base, darker toward the tip, 



