53 



Bembecia {Trochilhun marginatum) Marginata. Harris. 



Trochiliuin Rubi. Riley. 



Sesia Flavipes. Hidst. Bull. Brooklyn Ent. Soc. 



Trochilium Caudatum. Harris. 



A <5 in the collection of Prof. C. V. Riley has the trans- 

 parent space of forewings exceedingly small, consisting only of 

 two longitudinal streaks along the sides of the median nervule. 

 The antennae are bright orange. This singular species should 

 form the type of a new genus, for which I propose the name of 

 Alcathoe. It may be readily separated by the caudal appen- 

 dage of the $, which is as long as the abdomen, the forewings of 

 this sex being partly transparent, while those of the ? are wholly 

 opaque, resembling the genus Sciapteron. The hind tibiae are 

 furnished with a large bunch of hairs as in Melittia. 



Trochilium Syringe. Harris. 



This species has been re-described by Herr Moschler in Stett. 

 Entom. Zeitung, 1876, p. 311, as Grotea longipes. Herr Moschler 

 writes me that it certainly forms the type of a distinct genus, and 

 that he has elsewhere referred it to Podosesia. 



Trochilium Tibiale. Harris. 



? . In this sex, which appears to have been unknown to 

 Harris, the antennae are without pectinations, and are much 

 thickened towards their apical half. The bands of the abdomen 

 are narrower, only covering half the segments in 3, 5, 6, 7. In 

 all other respects it resembles the <5 . Montreal, Canada, Mr. 

 G. J. Bowles. 



Exp. wings, 35 mm. Length of body, 20 mm. 

 - Melittia Snowii. n. s. 



Allied to M. cucurbitce, Harris, but smaller, and singularly 

 unlike in color. Head above, thorax, base of abdomen and 

 upper side of forewings, pale fawn drab. Palpi, collar, pectus, 

 fore coxae and outer edge of tibiae sordid white. Antennae dull 

 brown. Dorsal portion of abdomen dull brown, sides dirty 

 orange, and lower portion sordid white. The hairs on the hind 

 tibiae are black inwardly, with a few bluish scales. Hind tarsi 

 clear white. Abdominal margin of hind wings dull testaceous. 

 Fringes of both, fawn drab. Beneath, the forewings are dull yel- 

 lowish, darker at posterior margin. Hind wings with the ab- 

 dominal margin of a brighter yellow shade than above. 



Exp. wings, 22 mm. Length of body, 12 mm. 



2 $ , Kansas, Prof. Snow, to whom I regardfully dedicate this 

 very interesting species. 



Melittia Amgena. n. sp. 



Head black in front, with a few bluish scales. Palpi above 

 orange, beneath white, terminal joint black within. Eyes dull 

 orange, with the orbits clear white. Antennae bluish black. 

 Thorax dull bronze black, with the collar pale dull greenish, and 



