1 5 m^ 



Vol. 5, p. 123-124. July 21, 1924. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



A NEW CYNORHINELLA (SYRPHIDAE, DIPTERA). 



BY RAYMOND C. SHANNON. 



This peculiar little fly was kindly loaned for study by Mr. 

 C. W. Johnson. It proves to be our first eastern United States 

 species of Cynorhinella. Unfortunately only the female is at 

 hand and it lacks one of the conspicuous characteristics of this 

 genus, namely, a saw-toothed projection on the outer apical end 

 of the hind femora. However, it possesses the other character- 

 istics of the genus and very probably when the male is found it 

 will make up this deficiency. 



The following notes relate to the status of the genus. Curran 

 erected Cynorhinella (Canadian Entomologist, vol. 54, p. 14, 

 1922) for a new species which he named canadensis (male). He 

 states in the description: "I am unable to place the following 

 specimen in any genus known to me, and it traces out to Cyno- 

 rhina in Williston's manual, and apparently comes closest to this 

 genus but the thickened, arcuate hind femora with the pro- 

 jection apically, and the more distinct facial side margins separate 

 it. It is related to Chilosia and Chrysochlamys by the last 

 mentioned character, but there is no semblance of bristles and the 

 shape of the abdomen is distinctive." The name Cynorhina, 

 referred to by Curran, does not, however, appear in Williston's 

 Manual. It is considered as a subgenus of Criorhina in the 

 ''Synopsis of North American Syrphidae," and was raised to 

 generic rank in Bulletin Brooklyn Entomological Society, vol. 16, 

 p. 33, 1921. From the foregoing it would appear that this genus 

 should be located in the subfamily Xylotinae. 



In the same year, I proposed the genus Apicomyia for Myio- 

 lepta bella Williston (Insecutor Inscitiae Menstruus, vol. 10, 

 p. 122, 1922), and retained it in the subfamily Chilosiinae. In 

 1923, Curran made this genus a synonym of Cynorhinella (Cana- 

 dian Entomologist, vol. 55, p. 155). It is here proposed to hold 

 the genus in the Chilosiinae on the basis of the following charac- 

 ters (Curran does not state the position of the discal cross-vein 

 in his description but it is assumed that it is in the same position 

 as shown by its congeners) : 



123 



