PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. VIII, No. 5, pp. 157-179, text figs. 1-10 Sept. 16, 1918 



THE KELP-FLIES OF NORTH AMERICA 

 (GENUS FUCELLIA, FAMILY ANTHOMYID-ffi) 



J. M. ALDRICH 

 Bureau of Entomology, U. S. Department of Agriculture 



The genus Fucellia was established in 1841 by Robineau- 

 Desvoidy (Annales Soc. Ent. France, x, 269), with the single 

 species arenaria. The type specimens are lost, and the descrip- 

 tion contains at least two palpable blunders; but from the 

 account of the habits of the adult on the French coast, it is 

 undoubtedly identical with Haliday's Halithea maritima, pub- 

 lished in 1838 (Annals Nat. Hist., ii, 186). The generic name 

 Halithea is preoccupied, so maritima becomes the type of Fucel- 

 lia, and is so given by Coquillett (Type-Species, 1910, 545). 



The species of Fnccllia live in the larval stage in brown sea- 

 weeds (kelp, Fucus, etc.), cast up by the waves along ocean 

 beaches; the adults can be found all summer long on these 

 masses, often in immense numbers. Only inaritiiua and 

 fucorum have been reported at any distance inland ; their larval 

 habits in these situations are unknown. 



Stein has published an excellent monograph of the species 

 of the world, 14 in number, in W'iener Ent. Zeitung, xxix, 



September 16. 1918 



