28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



third segment with marginal row of strong bristles which are longer 

 than the fourth segment or any of the bristles thereon; fourth seg- 

 ment moderately bristly on its apical three-fourths. Abdominal 

 hairs depressed. 



The genitalia differ from those of aletiae in that, when viewed in 

 profile, the tips of the inner forceps are turned backward and the 

 sides and base of the forceps are more thickly bristly; outer forceps 

 more slender. 



Legs black, mid tibiae in male with one long bristle on the outside 

 near middle, no trace of smaller one above it, in female one long 

 and one short bristle. Hind tibiae thickly and evenly ciliate without 

 any longer bristles; front pulvilli of male longer than last tarsal 

 joint. 



Wing venation normal. 



Length, 8-9 mm. 



Described from four males and eleven females reared from Pholua 

 species, Springfield, Mass, (No. 2103) by G. Dimmock. 



r^/^e.— Male. Cat. No. 43055, U.S.N.M. 



14. ACHAETONEURA SCHIZURAE (To\<rnsend) 



Masicera schizurae Townsend, Psyche, vol. 6, p. 187, 1891. 



Front of male at vertex 0.23 the head width ; at widest part (base 

 of antennae) 0.38 the head width; cinerous, as is also the entire 

 face, no brassy tinge obvious ; frontal bristles in a single row, one or 

 two smaller bristles outside of them; facial ridges bristly about 

 one-half way, the bristles not of equal strength; bucca one-eighth 

 the eye height; antennae black, the third joint in male at least five 

 times the second. 



Thorax black, gray pollinose, the chaetotaxy as in frenchii; 

 scutellum brownish, with four pairs of marginal bristles, the second 

 pair from suture weakest; apical scutellar bristles short, vestigial 

 in the type specimen. 



Abdomen black, gray pollinose, the sides with a brownish tinge; 

 abdominal hairs depressed. First segment black, without marginal 

 bristles; second with a median pair (according to description these 

 bristles are sometimes absent) ; third with a marginal row; fourth 

 with long bristles on the apical border only. 



Genitalia of male wholly brownish, apparently of the same struc- 

 ture as in piperi but more slender and lacking the conspicuous tuft 

 of hairs at base of inner forceps. 



Legs piceous, mid tibiae with one long and one shorter bristle 

 above it. Hind tibiae evenly but not so densely ciliate as in piperi 

 and with one longer bristle. Front pulvilli of male grayish, very 

 long, nearly twice that of the last tarsal segment. 



