THE CANADIAN ENTOMOLOGIST 287 



Mesonotal prcvscutum yellowish, with three brown stripes, 

 the median one broad, not divided by a pale median vitta, ex- 

 tending to the suture, the lateral stripes are broad, narrow, uniform 

 in width until they cross the suture (not expanded behind), lateral 

 margin of the sclerite dull yellow, the ground color between the 

 brown stripes is very reduced; scutum, lobes dark brown, median 

 line yellowish; scutellum yellow, a brown median spot in front; 

 postnotum brown. Pleurae, mesopleurae brown in front, extending 

 from the lateral margin of the praescutum down to and suffusing 

 the mesosternum on the sides; metasternum pale brown. Halteres 

 dull 3'el!ow. Legs: coxae and trochanters yellow, suffused with 

 brown in front; femora, tibiffi and tarsi brown, a little darker 

 toward the tip. Wings subhyaline, veins brown. Venation (see 

 fig. 12, plate III) ; Sc. ending far before the origin of Rs; R^+^ almost 

 parallel to R^ 



Abdominal tergites yellowish-brown; sternites light yellow. 



Vial No. F.— Tokio, Japan; August, 1912; 1 9 . 



Holotype, 9 ; in Vial F. 



Type in author's collection. 



The three species of Gonomyia described by de Meijere as 

 AtarbcB (Tijd. voor Entbmol.; vol. 44, 1911) are all members of the 

 subgenus Leiponeura Skuse. These species are Gonomyia nebulosa 

 (I.e., p. 42, fig. 25); pilifera (I.e.; p. 43, fig. 26) and diffusa (I.e.; 

 p. 43, 44). They have nothing in common with Atarba and are 

 quite distinct from any members of the Leiponeura group, that I 

 know of, in their clouded wings. G. insnlensis differs from all of 

 the above species in its unmarked wings. 



Genus Erioptera Meigen., 

 Subgenus Acyphona Osten-Sacken. 



Of this subgenus, two species were included, both of which are 

 herein characterized as new. The only described Palaearctic 

 species, Acyphona maculata Meigen, of Europe, differs from the 

 Japanese species, as follows: Wing pattern, in maculata large, 

 rounded brown markings mostly with grey centers; the body-shade 

 is much lighter in maculata and there are several important differ- 

 ences in hypopygial characters, these being shown by the following 

 key: 



