230 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



Wiugs nearly hyaline, ouly faintly tinged with brownish on the outer 

 part. 



In all the eastern specimens that I have examined thei)ile of the tho- 

 racic dorsum is light colored; some of the western specimens are quite 

 the same, but the larger proportion of those from the Pacific Coast have 

 black pile. In all I have examined about fifty specimens from Maine, 

 New Ilampshire, JNIassachusetts, Connecticut, New York, Pennsylvania, 

 Canada, Georgia, Florida, Kansas, Colorado, Arizona, California, Wash- 

 ington Territory, and Oregon. 



Xylota subfasciata. 



Xylota stthfasctata Loew, Centur., vi, 57. 



Bahitot.— lied Kiver of the North (Lw.). 



^,5. Length, 8 to O'""^ Obscurely bronze green; second and third 

 segment of the abdomen luteons, with a slender stripe and a posterior 

 cross-band (that on the second narrow, on the third broad) black, lat- 

 eral margins blackish bronze; antenna wholly black, the arista of the 

 same color; legs black ; base of the front and middle tibiic and tlu^ fii^st 

 two joints of their tarsi luteons; tip of the hind tibia not i)rodnced 

 into a tooth, th(^ angle below, however, rather acute, hind coxiie of the 

 male dentate. 



Similar to X. quadrimaeidata [X. ejuncidn], but the anteunaj are wholly 

 black, the luteons spots of the abdomen are larger and the black stripe 

 separating them more slender; the tibife are more obscurely colored, 

 and the hind pair have a less acute spur at the tip. The spots of the 

 female abdomen are less luteous, sometimes in part, rarely wholly, me- 

 tallic. Loew, 1, c, translation. 



Xylota fraudulosa. 



Xjjlo'd fruiiihtlosa Loew, Centur., v, 41. 



Habitat. — New York, New Hampshire, Washington Territory!, Illi- 

 nois, Wisconsin (O. S.). 



5, 9. Length, 7""". Front of female somewhat metallic green; frontal 

 triangle and the face covered with gray pollen. Antennae reddish 

 brownish, the first two joints blackish, the arista black, but reddish at 

 the base. Thorax shining, somewhat metallic green, with four faintly 

 coppery dorsal stripes. Abdomen: the tlrst segment, the fourth and 

 following, shining metallic; in the male the second and third mostly 

 opaque black, each with two large quadrate yellow spots contiguous 

 with the lateral margins; in the female smaller and separated from the 

 margins. Legs black, somewhat greenish; knees, base of front and 

 middle tibiai, tirst two or three joints of the front and middle tarsi 

 light yellow; the intermediate joints of the hind tarsi more brown; 

 hind femora strongly thickened ; the hind coxae without tubercle be- 

 low. Wings faintly tinged with blackish. 



