SYNOPtSIS OF NORTH AMERICAN SYKPHID.^. 210 



vortex black, bat little shilling- in the female and thickly clothed with 

 yellowish-white pile, some of which descends alon.u' the side of the face, 

 below the antenuje; the occiput and the posterior and inferior orbits 

 beset with pile of the same color. Antennse brown, first Joint some- 

 times i)aler; arista reddish. Thorax metallic greenish-black, rather 

 thickly clothed with long i)ile, which does not, however, much obscure 

 the ground color ; the pile on the dorsum is obscurely yellowish or dull 

 grayish, more yellowish-white on the i)leura'. Halteres brownish. Ab- 

 <lomen dark or cobalt, blue, beset, especially on the sides- with long 

 whitish pile, in the middle more or less short and black ; in the male 

 the second segment is opaque black, except a triangle on each side and 

 a narrow hind margin, which are shining; the third segment has an 

 arcuated, somewhat narrow, opacjue black cross-band, sometimes inter- 

 rupted in the middle. Legs black; tibiae sometimes brown; knees of 

 the first two pairs yellowish-brown; legs beset with whitish i)i.le, longer 

 on the femora; hind femora somewhat thickened; hind tibiie rather 

 stout and somewhat curved, especially on the distal i)art. Wings sub- 

 hyaline, grayish. 



Two males and one female (O.T. Baion), California. This description 

 is but little amended from the original, also drawn from three specimens. 

 My female, which may be somewhat tenei-al, has the legs also more red- 

 dish, the second segment opaque in front, dilated in the niid<lle behind 

 to a point, the hind femora are a little less thickened, and the hind 

 tibiii^ a little less bent. Baron Osten Sacken's specimens were reared 

 from pupa? found in February under the bark of Quercus agrifolia. 



Crioproia femorata. (Plate X, ligs. 5, 5a.) 



Crioprora femoraia Willistnu. Proc. Am. Phil. Soc, xx, 329. 

 Habitat. — Oregon, Washington Territory! 



■6,9. Length. 15 to Ki""". Deep shining black. Front in female 

 somewhat narrowed above, with black pile, a little less shining and 

 coj)i)ery-colored above in the male, at least a spot of whitish dust above 

 the antennae on the side. Eyes in male narrowly sei)arated below the 

 ocelli. Face everywhere shining, bare, only moderateiy produced and 

 obtuse below. Antenuie reddish brown ; arista yellow. J)orsum of 

 thorax and scutelluni shining metalli(^ black, with abundant, moder- 

 ately long, yellow ])ile; pleunie with black i)ile. Abdomen somewhat 

 elongate in the male, oval in the female, with a brassy reflection, much 

 shining; first segment, excei)t rhe sides, and the second in front and 

 middle subopaque ; pile short, not very abundant, black, longer near 

 the sides ; on the sides of the second segment longer and yellow. Knees 

 shghtly reddish, pile of legs black, short and sparse on the tibiae; the 

 front and hind tarsi with golden pubescence ; hind femora in the male 

 much thickened and bent, with a row of short spinous tubercles below; 

 liind coxae obtusely tuberculate below, and the hind tibiae abruptly an- 

 gulated ; in the female the hind femora and libiie not bent, the former 

 swollen, but the tubercles less distinct; the coxae not at all tuberculatej 



