16 THE CANADIAN ENTOMOLOGIST. 



Fam. Milichid^e : 



Cacoxenus indagator ; larvae live in nests of Osmia emarginata, con- 

 suming the food prepared for the Osmia larvae and causing them 

 to die (Giraud). Probably found in other bees' nests (Sch.) 



Fam. Agromyzim: : 



Agromyza ; larvae are leaf-miners or live in pith of plants (Sch.) A. 

 tritici ; bred from larvae crawling in large numbers from un- 

 threshed wheat in a barn (Fitch). 



Ceratomyza ; larvae of one species mine leaves of Sonchus oleraceus 

 (Sch.) 



Fam. Phytomyzid^e : 



Phytomyza ; larvae are leaf-miners (Sch.), some species pupating in 

 the parenchyma of the leaf (Chromatomyia Hardy). P. chry- 

 santhemi ; larvae mine leaves of Chrysanthemum, Tanacetum, 

 Eupatorium, Gazania, Helianthus, Cineraria (Lintner). P. 

 lateralis ; larvae live in heads of Anthemis, Pyrethrum, and in 

 stems of Centaurea, Verbena and Urtica (Kaltenbach), mining 

 in Sonchus (Gourean). P. fiava ; larvae in subcutaneous 

 mines in leaves of Scolopendrium vulgare, a fern (Doubleday). 

 P. flaviceps ; larvae mine leaves of woodbine (Hal.) P. obscur- 

 clla ; larvae mine leaves of holly (Hal.), in honey suckle (Glover). 

 P. nigricornis ; larvae mine in underside of leaves of turnip, 

 peas, forming long galleries in parenchyma beneath lower cuticle, 

 pupating at end of gallery (Curtis), also mine leaves of monks- 

 hood, Aconitum (Kaltenbach). 



Fam. BorboriD/E: 



Borborus ; larvae in dung and decayed fungi (Haliday). 

 Sphaerocera ; larvae live in horse dung (Sch.) 



Limosina ; larvae of a species in Confervae, in diseased potatoes, and 

 in fungi (Sch.) 



Note. — If any genera whose larval habits are known have been 

 omitted, or if any peculiarity in habit of a genus here mentioned is not 

 included, the author will be glad to know of the references or observa- 

 tions. The list is not supposed to be complete. 



