WiiliJtoii.] *^^4 [Mai' Kt, 



spot on each side near the eye above ; hj^perstoma much projecting. 

 Frontal triangle (J^) swollen, distinctly fossulate, front (?) with Avell 

 marked lateral grooves. Eyes uniform. Thorax and scutellum shining 

 green, finely punctulate, with obscure pile. Abdomen broad, black, with 

 short appressed white pile, but little shining, in the male the entire margin 

 with the hypopygium shining brassy green, the venter shining like the 

 border. Wings fuscous, stigma brown, outer anterior angle of first pos- 

 terior cell obtuse. Legs black. Long. corp. 6-7 mm. California. 



Chrysogastkr bkllultjs, sp. nov. 



(^9. Antenme reddish-brown, a little longer than the face, second 

 joint a little shorter than third. Face green black, lightly rugose, white 

 pilose, hyperstoma moderately produced downward. Frontal triangle ((j^) 

 not swollen, front (9) with well marked lateral rugosities, eyes with 

 irregular narrow linear markings. Thorax and scutellum bright green, 

 scabrous, with four narrow coppery stripes. Abdomen oval, a little darker 

 green, more shining on the borders, punctulate. Legs black, base and 

 tips of all the tibia3, and first joints of tarsi yellowish-red. Wings nearly 

 hyaline, slightly clouded in the outer cells, stigma brownish, last section 

 of fourth vein straight, rectangular, joining the third nearly at light angles 

 opposite the tip of second vein, clouded with brown, the cloud either ex- 

 tending across to tip of second vein or more or less interrupted in front of 

 the third. Long. corp. 6-7 mm., Washington Territory, California. 



Difl'ers from G. nitidus Wied., which it closely resembles, in its larger 

 size, the second joint of antenna? proportionately a little shorter, and the 

 concavity of lower part of face being less, in the absence of abd(miinal 

 fasciae, and in the termination of the fourth vein. 



Chkysogaster ntgrovittatus Lw., Zeit. f. Ges. Naturw, 1876, p. 323. 

 Colo., Washington Terr. ! Calif. 



DD. — Face and front without transverse wrinkles ; fiilse A'ein always 

 present, the fourth vein never bent inwards toward the tip ; fiice 

 usually with distinct tubercle, third joint of antennaj never 

 elongate. Small or medium sized species, more or less pilose, ab- 

 domen never slender. Cheilosia. 



This genus, a very large one in Europe, has hitherto consisted of but 

 seven described species, none of them from west of tlie Rocky Mountains. 

 I describe here five additional ones from the Western regions, two of 

 them belonging to the division with i)ilose eyes hitherto undescribed in 

 this country. 



Three or four of Dr. Loew's species are unknown to me, but this writer's 

 familiarity with the genus enables his species to be placed with a good deal 

 of certainty from the descriptions alone. In the identification of species 

 described in but one sex, it should be remembered that in the female 

 the pilosity of the eyes is less, the antenna^ usually lighter colored, and 

 the third joint larger. 



