10 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.69 



CHRYSOTOXUM FASCIOLATUM (DeGeer) 



Musca fasciolatum DeGeer, Mem. peur serv. I'hist. d. Ins., vol. 6, 1776, 

 p. 55.— CuRKAN, Can. Ent., vol. 56, 1924, p. 40. 



Differs from laterale chiefly by having the second antennal joint 

 longer than broad, the relative lengths of the joints being 1 : 1.25 : 

 2.5-3. Lengths about 15 mm. Three males, three females. Agrees 

 essentially with European specimens. 



Type locality. — Europe. 



Type. — Location unknown. 



Distribution. — Maine: Echo Lake, Mount Desert, June IT, 1921 

 (C. W. Johnson). New Hampshire: White Mountains (H. K. 

 Morrison) ; Mount Washington, June 21, 1874 (H. K. Morrison) ; 

 Mount Washington (H. G. Dimmock). 



CHRYSOTOXUM RADIOSUM, new species 



Chrysotoxum pubescens Loew, Cuuran, Can. Ent., vol. 56, 1924, p. 39 (mis- 

 identification ) . 



A rather small to moderate sized species. Frons black pilose, the 

 pollinose spots in female small ; antennal joints 1 : 1.5 : 2, the arista 

 much shorter than antenna ; thoracic pubescence yellow, a few black 

 hairs on scutellum; all femora, tibiae, and tarsi j^ellow; abdomen 

 mostly yellow pilose above and below; arcuate abdominal bands 

 entire or subinterrupted in middle, joining the posterior margins of 

 the tergites and barely coloring the apical corners of the tergites, 

 leaving the sides of the abdomen almost entirely black; apical cor- 

 ners of the tergites moderately produced; hind and side margins of 

 fifth tergite in the female about equal, the anterior margin nearly 

 three times as long as the side margins; wings infuscated anteriorly. 



Length, 10-13 mm. 



Separated from integrwm and other allies by the absence of the 

 yellow hind margin on the second sternite and the presence of a pair 

 of yellow spots on the third sternite bordering on the anterior 

 margin. 



Type locality. — South Wanatah, Ind. 



Type.—Q2it. No. 28311, U.S.N.M. Male type; allotype, female; 

 paratypes, four females. 



Distribution.— CoivnQciicMt: New Haven, June 5, 1910 (A. B. 

 Champlain). Indiana: South Wanatah, June 1, 1916 (J. M. Aid- 

 rich) ; LaFayette, September 30, 1915 (J. M. Aldrich). South Da- 

 kota: Brookings, June 16, 1891 (J. M. Aldrich). Washington: 

 Locality? (Williston collection). State and locality? (bears the 

 number 51). 



