3G BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



third black, ouly a little longer than the second. Face rugose ; concave 

 on the lower part, the ei)istoma but slightly produced ; a small silvery 

 spot on each side near the eye above. Front in female narrow above, 

 strongly transversely rugose, with a median furrowed longitudinal line. 

 Frontal triangle rugose. Eyes with a median straight horizontal line 

 and two vertical labyrinthine brown lines. Dorsum of thorax metallic 

 green, tinely roughened, with four longitudinal stripes of a coppery or 

 metallic purple color, in some reflections brown, the outer ones more or 

 less divided into two nearly contiguous ones. Scutellum more distinctly 

 roughened, or lightlj' rugose, grooved before the apex. Abdomen deep 

 metallic green, roughened, and only a little shining on the disk, but dis- 

 tinctly so on the margin and tip. Second and third segments with more 

 or less distinct cross bands of a more opaque color in front and behind. 

 Legs metallic black ; knees and base of tibiae and their tij), and first 

 two joints of tarsi, reddish yellow. Wings nearly hyaline, with slender 

 blackish spots on the outer cells; stigma dilutely brownish; a narrow 

 brown cloud from tip of second vein reaching across the sub-marginal 

 cell ; cross veins narrowly clouded with brown ; veins at outer part of 

 discal and first posterior cells rectangular, nearly straight, slightly an- 

 gulated in the middle, and with a stump of a vein on the inner sides; 

 the fourth vein terminates distinctly beyond the tip of the second. 

 .Numerous specimens. 



Chvysogaster bellula. (Plate II, figs, 6, 6a.) 



Chrtjaogaster bit! lulus VVilliston, Trans. Amer. Phil. Soc, xx, 304. 



Habitat. — California, Washington Territory, Colorado !. 



S ,9 . Length, 4.5 to 6°"". Antennae reddish or reddish brown, about 

 as long as the face, second joint shorter than the third. Face deep 

 green, lightly rugose, white pilose, a small triangular white silvery spot 

 near each orbit just below the antennae; epistoma moderately pro- 

 duced downwards. Frontal Iriangle not swollen, rugose; front (2) 

 with well marked lateral rugosities ; eyes with irregular narrow brown 

 markings. Thorax and scutellum bright green, scabrous, with four 

 copi)ery stripes. Abdomen oval, a little darker green, sometimes with 

 a bluish cast, opaque, shining on the borders, lightly punctulate, on 

 the posterior part of each segment sometimes coppery. Legs black- 

 ish green, base and tip of the tibiae usually narrowly, and the basal 

 jointsof the tarsi, yellowish red. Wings nearly hyaline, lightly clouded 

 in the outer cells, stigma brownish, the cross-veins scarcely clouded ; 

 last section of the fourth vein usually straight, rectangular, joining the 

 third nearly opposite the tip of the second vein, clouded with brown, 

 the cloud either extending across to the tip of the second vein or more 

 or less interrupted in front of the third. 



Twelve specimens, Colorado (Professor Comstock), California, Wash- 

 ington Territory. 



