A GENUS OF MARITIME DOLICHOPODID^E NEW 

 TO AMERICA. 



BY WILLIAM MORTON WHEELER, PH. D. 



Plate IV. 



Of the three maritime genera of Dolichopodida? described 

 from Europe, viz., Machcerium, Thinophilus and Afhrosylus, 

 only one has hitherto been found to be represented in this 

 country. This is Thinofhilus, of which I described a spe- 

 cies from Wyoming during the past year. 1 While working 

 on the marine fauna of Monterey, California, during the 

 summer of 1896, and again during January of this year, 

 while similarly engaged at San Diego, California, I ob- 

 served three species of Dolichopodidas flitting about in the 

 spray of the breakers among the sea weeds on the rocks 

 below high water mark. Closer examination shows that the 

 three species are all new, and that they are assignable to 

 Aphrosyhis Walker, a genus comprising four European spe- 

 cies : A . ferox Walk. , A . celtiber Hal. , and A . raptor Walk. , 

 from the sea coasts of Northern Europe, and A. venator 

 Loew, from the coast of Italy. 



Loew 2 sums up the characters of the genus Apkrosylus 

 in the following words: "The first joint of the antennas 

 without hair, the second of the usual transverse form, the 

 third tapering at the tip; the arista entirely apical. The 

 face narrowed above, especially in the male. The proboscis 

 turned towards the breast. Palpi disengaged, hanging 

 downward, in the male larger than in the female. The 

 abdomen of the male shows six segments; the short and 

 rounded hj'popygium ends in the shape of a knob ; its external 

 appendages are elongated, parallel lamella?, fringed with 

 rather long hair. The female abdomen has only five 

 segments. Wings of rather equal breadth; the posterior 



1 Ent. News, May, 1896, pp. 155-156. 



-Monograph of N. Am. Dolichopodidae. Smith. Misc. Coll., 171, 1864, p. 148. 



[ M5] July 1°, i897- 



