Vol. VIII] ALDRICH— KELP-FLIES OF NORTH AMERICA \ 59 



generic with maritima; for instance, in the known species the 

 costal setules may be much larger than in uiaritiina (costalis) 

 or absent {cvermanni) ; the lower hind stpl may be absent 

 (bicniciafa and cz'criiiamii) ; a few very minute hairs may 

 occur underneath the scutellum (in some but not all specimens 

 of separata, costalis, and fiicorum) ; and so on. The head 

 structure, venation, and ch?etotaxy, however, vary but little, 

 and the group is decidedly homogeneous, although the species 

 are easily separated. 



Down to 1893, the genus had been uniformly referred to the 

 family Scatophagid?e (or Scatomyzidje), so far as I have been 

 able to trace its history. In the year mentioned, Girschner 

 (Berl. Ent. Zeitsch, xxxviii, 304) referred it to Ccenosiinse; 

 but as he included Scatopliaga, Cordylura, etc., in the same 

 group, this has not much significance. Becker (ibid, xxxix, 

 80) in the following year first definitely separated the Fucellias 

 from Scatophaga and its allies. "They are," he wrote, "Antho- 

 myids, clearly excluded from this family by having a four- 

 segmented abdomen, cruciate frontal bristles, and a pair of 

 costal spines at the end of the auxiliary vein." Stein accepted 

 this disposition of them in the Palaearctic Catalogue (1908), 

 where they stand as a subfamily, Fucelliinas containing but the 

 one genus. 



Malloch, in a recent analysis of Anthomyid subfamilies 

 (Canadian Ent., xlix, 408; Dec, 1917) separates Fucelliin?e 

 from Coenosiinae in the possession by the former of cruciate 

 frontal bristles and a spine below on the hind basitarsus. the 

 sternopleurals being never in the form of an equilateral 

 triangle. 



Schnabl and Dziedzicki, Die Anthomyiden, 1911, p. 123, 

 proposed the genus FuccUina for Fucellia griscola Fall., signata 

 Zett., and pictipcnnis Beck. The principal character is that the 

 tronto-orbital bristles are single-rowed in FiiceUiua, and 

 double-rowed in Fucellia. This I must regard as purely a mis- 

 take, as they are single-rowed in all that I know. Several 

 other characters are mentioned, but they do not remain grouped 

 in our species, but split in all directions. Hence FuccUina ap- 

 pears to be only another in the long list of unsuccessful attempts 

 to improve Anthomyid genera. 



