258 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



hind ones with a yellow sj)()t. tlic l)a.>-e of IVoiit and luiddk' femora black- 

 ish, of the hiud femora brownish (in my single female wholly reddish 

 yellow). Wings brownish, lighter towards the posterior part; a dark 

 narrow spot extends from near the tip of auxiliary rein to the base of 

 third posterior cell. 



Seven specimens, Connecticut, June, and one from Minnesota (Keen). 



Sphecomjria brevicornis. 



Sphecomyia hrerlcornis Osteii Sackeu, WcsTern Dipt., 341. 



Habitat. — Webber Lake, Sierra County, California (O. S.). 



" $ . AnteunsB black, about half as long as the eye from its upper to 

 its lower corner; they are inserted on a conical, black projection of the 

 front; joints nearly of the same length, the first cylindrical, the second 

 sub triangular, the third rounded, somewhat brownish ; arista yellowish. 

 Face and front golden yellow, the former with a black stripe reaching 

 from the antennse to the mouth; cheeks black; vertex black; posterior 

 orbits golden yellow. Thorax black; humeri, two dorsal lines, inter- 

 rupted in the middle and not reaching the scutellum, a large spot on the 

 pleurse and a smaller one under it yellow; scutellum yellow, its poste- 

 rior edge black, beset with brownish pile; halteres with yellowish knobs. 

 Abdomen yellow; first segment black at base; the second segment has 

 two narrow black cross-bauds, the one at the base, the other about the 

 middle; the second does not reach the lateral margins; they are con- 

 nected in the middle by a black line ; the third segment has a narrow 

 black border anteriorly, a small, black, diamond-shaped spot in the 

 middle, and two black streaks on each side between this spot and the 

 lateral margin ; the black anterior margin of the fourth segment is en- 

 tirely concealed under the preceding segment, but a diamond-shaped 

 black spot in the middle and black streaks on the sides are similar to 

 those of the preceding segment; hypopygium yellow. Femora black, 

 except the tip, which is yellowish; the hind femora have the latter half 

 brownish yellow; tibiae and tarsi brownish yellow; the last two joints 

 of the tarsi black; the end of the third joint brown. Wings tinged with 

 brownish, somewhat yellowish at the base and along the anterior margin; 

 a brownish cloud on the cross- veins. Length, 11 to 12"""." 



"This species is very like the well-known Sphecomyia vittata, but is 

 smaller, has the first two joints of the antenuse much shorter, and a 

 somewhat different picture of the third and fourth abdominal segments.'^ 



Sphecomyia Pattoni. (Plate xii, fig. 8.) 



Sphecomyia Pattonii Willistou, Proc. Am. Phil. Soc, xx, 328. 

 Calliprohola calorhina Bigot, Annales Soc. Ent. Fr. , 1884, 353. 



Habitat. — AVashington Territory ! 



S ,9 . Length, 13 to U'"". Front a little longer and more inclined 

 than in S. vittata, black in the female, with a rounded yellow spot each 

 side, narrowly separated from the yellow of the face ; frontal triangle 

 in the male black in the middle, near the eyes yellow. Eyes of male very 



