24 



One specimen, Fort Kent, Maine, August 17, 1920. Type in 

 the collection of the Boston Society of Natural History. I am 

 placing this provisionally in the above genus until more material 

 is available. 



Amphicnephes pullus (Wiedemann). Fig. 8. 



In the Genera Insectorum, Diptera, family Muscaridae, sub- 

 family Platystominae, p. 133, tab. 12, figs. 223, 224, 1914, Hendel 

 figures this species as the genotype, presumably from the type, 

 which is in the Museum at Vienna. Recently in studying some 

 specimens from Florida, in connection with those from the more 

 northern States, I find that those from Florida have the antennae 

 as figured by Hendel, the third joint being about six times as long 

 as the second (fig. 8), narrow, of even width and slightly concave 

 above, with the end bluntly rounded. In the more northern 

 specimens ranging from North Carolina to Massachusetts, which 

 represent the A. pertusus Loew, the third joint is only three times 

 as long as the second (fig. 9), rounded below and straight above 

 and ending with a blunt point at the upper edge. The Florida 

 specimens are also larger, measuring 4 mm., while the northern 

 specimens are 3 mm. 



Loew's genus Amphicnephes was based on A. pertusus and being 

 monotypic, that species becomes the genotype instead of A. pullus. 



Rhynencina, gen. nov. 



Front broad, with two pairs of inclinate fronto-orbital bristles; 

 two large vertical bristles with a small orbital in front opposite the 

 ocelli. The third joint of the antennae is rounded and less than 

 twice the length of the second. Face, palpi and proboscis greatly 

 protruding, the latter bent backward and longer than the head. 

 The anterior cross-vein is midway between the base and the outer 

 end of the discal cell; basal cells of equal length. 



Genotype, R. longirostris, sp. nov. 



Rhynencina longirostris, sp. nov. Figs. 6, 7. 



cf . — '■ Front bright yellow, opaque; ocellar triangle small, blackish, with 

 two bristles; antennae dull yellow, aristae black, pubescent; face yellow, 

 shining, protruding, the prominent palpi about one-half the length of the 

 head; proboscis yellow, very long and extending backward from the bend to 

 the tip, longer than the head; occiput yellow, with two black spots in the 

 middle. Thorax dark yellow, opaque, with numerous fine black hairs, a 



