NOTLS. 2 i 7 



as for instance S. dclinccitns Macq. , but, of course, it is impossible to 

 judge from descriptions alone." (Reproduced from the Bull. Buff. Soc, 

 N. H. 1876.) Since writing the above, I have discovered Alloiimiita 

 fraetci, n. sp. in California, which also shows tlie generic characters, as 

 defined above. Si/rplius cxotkus Wied., Auss. Zw II, 136, is likewise 

 an Allograpia. 



215. Xanthogramma felix 0. Sacken 2. (Bull. Buff. Soc. 1. c.) 

 Female. — Face and cheeks yellow (in all nij^ specimens, except 



one, the face has the brownish -red tinge, which the faces of Sijrphi 

 sometimes assume); vertex dark metallic green, emitting a stripe of 

 the same color, which reaches the base of the antennae, where it 

 expands little; between this stripe and the eyes, the front is yellow. 

 Antennae black, sometimes faintly reddish on the under side, near the 

 suture of the second and third joints; third joint rather l.irge, oval, 

 blunt. Thora'-ic dorsum of a rather bright metallic green; on each side 

 a yellow stripe runs from the humerus to the callosity near the scutel; 

 the latter yellow, its extreme base and corners blackish or brown. 

 Pleurae with a large, ill -defined yellow spot below the wings. First 

 abdominal segment with a yellow spot each siile (just under the hal- 

 teres); the first cross-band (on the second segment) is either interrupted 

 by a very narrow black line in the middle, or entire; the second band 

 is coarctate in the middle, its hind margin being a shallow obtuse angle; 

 the same may be said of the thini band, except that the obtuse angle 

 is deeper and often has a notch in the middle , which sometimes cuts 

 the band in two; there is a narrow fourth band at the base of the 

 fifth segment, encroaching upon the hind margin of the preceding seg- 

 ment; the filth segment has a narrow yellow posterior margin. Legs 

 yellow, hind legs black or l)rown, except the base of the femora and a 

 space on both sides of the knees. "Wings with a distinct brownish tinge 

 on their distal half, anteriorly; stigma brownish; sometimes the whole 

 wing has a brownish-yellow tinge. Length: 9V2 — lO'/^ ""n 



Ildhifnt, Westpoint, N. Y. , in Sept. 8 — 10, three females; Blinois; 

 Pennsylvania. (The specimen from the latter locality is smaller, wings 

 more hyaline, legs and antennae of a paler color.) The first and third 

 band are as often interrupted as not; the second often shows a vestige 

 of an interruption in the shape of an indistinct blackish line in the 

 middle. 



216. Ocyptamus Amissas Walker. In my List of N. A. Syrphidae, 

 I took this for a synonym of 0. fii!<ci/inunft. Since then I saw that 

 Dr. Loew, in his N. A. collection, considered it a different species, and 

 he may be right. 



0. Badaca Walker, which I have seen in the Brit. ]\Ius. is perhaps 

 a synonym of 0. Aniisf^a^ or of coiiformifs Loew; the posterior part of 

 the wing is hyaline, traversed by a brown cross-band. 



217. Brachyopa vacua 0. Sacken $. (Bull. Buff. Soc. 1. c.) 

 Brownish gray, thorax with three brown stripes; abdomen brown, 



its basal third whitish yellow, with a brown line in the middle; aiista 

 bare. Length: 8—9 mm. 



