THE CANADIAN ENTOMOLOGIST. 195 



NEW CYCLORHAPHOUS DIPTERA FROM MEXICO AND 



NEW MEXICO. 



BY D. W. COQUILLETT, WASHINGTON, D. C. 



In the course of identifying a series of Diptera received by Dr. L. O. 

 Howard, and collected in Mexico and New Mexico by Mr. C. H. T. 

 Townsend, a number of new forms were encountered, and as manuscript 

 names of these will soon be sent out it is desirable that these forms 

 should be duly characterized ; accordingly, the descriptions are presented 

 for publication herewith. 



Family SyrphiDjE. 

 Spilomyia obscura, new species. 



Head black, the face, frontal triangle of male and lower part of front 

 of female, prolonged upward along the eyes to a point nearly opposite 

 the lowest ocellus, yellow ; antennae yellowish brown, the joints subequal 

 in length, arista yellow, mouth-parts black ; thorax black, a yellow spot 

 on each humerus and a smaller one above it, a vitta extends from each 

 postalar callosity obliquely to the suture, where it is prolonged inward as 

 a silvery white streak; a pair of oblique yellow spots in front of scutellum, 

 a yellow spot on posterior part of mesopleura, one on the sternopleura, 

 one above front coxa and a small prominence beneath insertion of wing ; 

 scutellum wholly black ; abdomen black, a yellow spot on each side of 

 the first segment, an interrupted yellow fascia on anterior part of the 

 second, broadly dilated at the sides, a yellow streak in each hind angle of 

 this segment, third and fourth segments with a yellow fascia on the front 

 part and another on the hind margin, the former interrupted on the third 

 segment, sixth segment of female, except the front margin, yellow; coxae 

 black, a yellow spot on outer side of the hind ones: femora yellow, the 

 posterior side, except at the ends, black, least extended on the middle 

 ones ; tibiae yellow, their apices and the tarsi yellowish brown ; wings 

 hyaline, costal margin to the spurious vein brown; length, 15 to 17 mm. 

 A specimen of each sex collected August 27th and September nth. 



Habitat. — Sierra Madre, Chihuahua, Mexico (head of Rio Piedras 

 Verdes, altitude about 7,300 feet). 



Type. — Cat. No. 6290, U. S. National Museum. 



Ocyptamus notatus, new species. 



Head black, the face and broad sides of frontal triangle yellow, 

 antennae and proboscis black : body black, the prealar and postalar 

 callosities, sides of scutellum, except at base, and a pair of circular or 



