50 Tacliinidae. 



Exorista fimbriata and Westermanni, Phryno, Zenillia libatrix and 

 pullata, Gaedia, Paks, Gonia, Baumhaueria, Histochaeta, Rhacodifieura, 

 Hebia, Brachychaeta. 



Group 3. The larviparous Sarcophaginae. 



Group 4. Ovoviviparous species depositing the immediately 

 hatching eggs on piaces frequented by the hosts which are lepi- 

 dopterous larvæ; the young larva is covered with chitinous piates 

 which by contracting of the body form a mail, preventing exsicca- 

 tion. Very prolific. Here Lydina, Lypha, Eversmannia, Gymnochaeta, 

 Linnaemyia, Micropalpus, Chrysosoma, Nemoraea, Echinomyia, Pele- 

 teria, Ernestia, Meriania. 



Group 5. Species behaving in a similar way, but of less fecundity. 

 Here Digonochaeta, Eriothrix, Myiocera carinijrons, Macquartia 

 chalconota and probably Steiniella collida. 



Group 6. Ovoviviparous species depositing on the skin of the 

 host. Here Exorista affinis, Phryxe vulgaris, Bucentes cristata and 

 geniculata, Voria, Plagia, Pelatachina, Myiobia inanis, Phyllomyia, 

 Thelaira and probably Viviania. 



Group 7. Ovoviviparous species which after wounding the host, 

 deposite the eggs in it by aid of a special, spine-like apparatus. 

 Here Lydella nigripes. 



Group 8. W eberia-gvou^ ; as group 7 but wounding the host 

 {Carabids) with the ovipositor itself. Here Weberia, and probably 

 Freraea and Besseria. 



Group 9. Oviparous, with a more or less complicated apparatus 

 used for holding and piercing the host when depositing the eggs in 

 it. Here Allophora and probably Ocyptera and Leucostoma. The hosts 

 known are Hemiptera. 



Group 10. Only two Carce/m-species; attach stalked eggs to 

 the liairs of the host larva. Carcelia cheloniae and gnava. 



As seen, these groups are biological and most of them (except 

 the Sarcophagas and Phasiins) include genera which do not seem 

 to be related systematically; it is so at all events according to the 

 systematic arrangement which I have adopted, but it cannot be denied 

 that one of the groups, viz group 4 includes genera hitherto considered 

 as related, and Thompson in his work on the larvæ of group 2 (Ann. 

 de Parasitol. humaine et comparée, II, 1924, 185) is inclined to ascribe 

 systematic importance to the ethological and larval characters. It 

 must be remembered that a fmal system has not yet been reached. 



