232 NOTES. 



the al)domen, at tlie base, are clothed with white hairs; the surface 

 of the abdomen is clothed with short, microscopic pile, which, in a 

 certain light, appears golden -jel low. Legs black, tarsi more or less 

 dark chestnut- brown; femora with the usual white hairs, tibiae with 

 white bristles, the front pair with some black bristles on the underside. 

 Wings hyaline; a grayish tinge on the distal half is hardly perceptible; 

 venation normal. 



Hah. Massachusetts ; Cayuga lake, New York (Mr. Comstock) ; Nova 

 Scotia (Walk.). Two females. 



Cyrtopigon lyratus n. sp. $. Legs, mystax and antennae altogether 

 black; thoracic dorsum with a very distinct pattern in whitish pollen. 

 Length: 13—14 mm. 



Ftmnle. Head black, densely grayish-pollinose on the face, slightly 

 on the sides of the front; mystax altogether black; hairs on the occi- 

 put black above, white below; antennae black, third joint but little lon- 

 ger than the two preceding, taken together. The usual thoracic stripes 

 are dark brown, the white or yellowish pollen in their intervals forms 

 the following pattern: a median line, attenuated posteriorly; a figure in 

 the shlipe of a tuning-fork, having the end of the handle in front of 

 the scutellum, connected with the end of the median line; abroad strijje 

 on each side between the humeral and the antescutellar callosities, atten- 

 uated and abbreviated before reaching the latter; these lateral stripes 

 are twice connected by pollinose crossbands with the branches of the 

 tuning-fork, the second time, along the thoracic suture. Scutellum black, 

 with black pile; grayish pollinose anteriorly. Pleurae grayish-pollinose, 

 with a stripe of more dense silvery-gray pollen on the lower part; the 

 fanlike fringe of hairs in front of the halteres is black. Abdomen black, 

 shining, with a bluish reflection on the firit five segments ; each of these 

 has a large spot of white pollen on each side, against the posterior 

 margin; the sides of the abdomen are clothed with white hairs, 

 which become gradually shorter posterioi-ly and do not reach beyond 

 the fifth segment. Legs black; bi'istles on the tibiae black; femora with 

 long white hairs on the underside; the last pair also on the upper side, 

 near the base. Halteres reddish-yellow. Wings hyaline on their jiroxi- 

 nial half, including the discal cell ; the distal half has a slight grayish 

 tinge; crossveins clouded with brown. 



Hah. Catskill ^Mountain -House, NY., July; White Mountains, 

 N. H Three females. The altogether black legs; the strong contrast 

 between the brown thoracic stripes and the whitish -pollinose intervals 

 between them; the altogether black beard etc. will help to distinguish 

 this species. 



lOG. Deromyia Thilippi. Verb. Zool. Bot. Ges. 1865, p. 705 is 

 erroneously referred by Gerstaecker, Entom. Ber 1867, p. 99, to Plesiiomma 

 Macq. It has a spur on the front tibiae and must be very closely allied 

 to Dioymitcs, if not identical with it. Schiner (Die Wiedem. Asil., p. 653) 

 refers it to Cyiiophrys Loew. 



107. Dasy;ogoii rufescens; the synonymy rests on the assumption 



