﻿40 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



only, and for this reason positive identification was not always 

 possible; such species are recorded with a question mark. 



The genus Ghrysogaster, subgenus Barheriella^ was not taken in 

 the rotary trap, but the misunderstood species alaskensis Shannon was 

 collected at Umiat. Melanostoma carinata Curran was also taken at 

 Umiat and is represented by five males and seven females. 



All drawings were made with the aid of a camera lucida except A;, 

 m, and o of figure 10. With the exception of these three, comparable 

 drawings are made to the same scale. (EH=ejaculatory hood; 

 S = style; C=cercus.) 



EPISTROPHE HUNTER! 7 Curran 



FiGUKE 10, a, & 



Epistrophe liunteri Cubkan, Kansas Univ. Sci. Bull. 15, p. 171, 1924. — Fluke, 

 Ent. Amer., new ser,, vol. 15, p. 11, 1935. 



This species was described from a single male from Teulon, Mani- 

 toba, and in my 1935 review I recorded a male from California and a 

 female from Maine. The present collection contains two males and 

 five females, but I make this determination with considerable doubt. 

 The males have a distinctively inflated face and front, as shown in 

 the accompanying figure, with wholly black cheeks, and the femora 

 are narrowly black at the base. The females are different from the 

 one I recorded from Maine principally in the color of the front, which 

 is yellow on the lower one-fourth to one-third, and in the somewhat 

 narrower abdominal bands. 



I do not believe these specimens can be terTninalis Curran, since the 

 oral angles are not produced. E. hunteri, E. terminalis, and E. im- 

 perialis Curran are very closely related, and a study of the genitalia 

 may be necessary to straighten them out. E. imperialis is also closely 

 related to E. melanostoma Zetterstedt. 



My recent studies of the genitalia indicate that these forms are true 

 Syrphus {Syrphidis Goffe), since they have a lingula on the penis 

 sheath similar to that on S. ribesii Linnaeus and its relatives, and in 

 other respects they are similar. I believe a better indication of generic 

 relationships than the presence or absence of hair on the disc of the 

 squamae is the presence or absence of hair on the metasternum, al- 

 though E. grossulariae Meigen, with a hairy metasternum, also pos- 

 sesses a lingula and the styles are more like those of Syrphus than 

 those of Metasyrplius. The so-called emarginatus group {Meta- 

 syrphus) with bare metasterni have a lingula, although it is rather 

 short, and in general the genitalia are similar to Syrphus. Most of 

 the slender species now included in Epistrophe should probably be 

 included in Stenosyrphus Matsumura and Adachi. All the Meta- 

 syrphus species that I have examined except the emarginatus group 



