314 



ENTOMOLOGICAL NEWS. 



[Jan 



manner of its derivation is understood, because the general- 

 ized Hymenoptera, the saw-flies, have mouth parts sufficiently 

 like the orthopterous type to make the homologies apparent, 

 and because there are among the various Hymenopterous in- 

 sects conditions of mouth parts gradatory from saw-fly to 

 honey bee. 



Now among the Diptera we search for the generalized mouth 

 among the presumably generalized flies, the Nematocera.* 

 And among all the Nematocera perhaps none has a mouth 

 which is more generalized, i. e., more nearly in the condition 

 of the tj'pical biting mouth, than Blepharocera. The femal es of 

 Blepharocera, like the females of Simulium, Ceratopogon, Dixa, 

 Culex and some other Nematocera, are blood-sucking, and, 



h'lii 4. BUfikaroerta capitala IjOCW, inoiitli purtN ; lb. <>/., litl)nini epl- 

 ntmrynx; mx., iiihxIIIu; mx. p., iiiiixllliiry luilpuH; md , iniiiidibio; 

 hyp , uy|>optiaryiix ; // , liiltliiin. 



while the mouth parlH of these forms are not strictly biting 

 the imiudiblcH are pri^Heiit, uh cutting or Huwing or piercing 

 organH. The nmlcH of thene forniH are nci'larlVr* ling and have 

 lotit the mandililoH. In the mouth purt>i of the leniaie Bleph- 

 arocera all of the partH of the typi(»il biting mouth are pres- 

 ent, the niaiidiblcH, loaxilhe and labium. The luaDdibles 



* For an account of ttie tnontli purtfl of all tlio Nomatocerous 

 ftroiliM Me Kellogg, "The Muuih imrtMof NiMnutcH'.erous Dlptora," 

 Pfjrobe, Vol. rlii, Now. 'i73, S76, 270, S77, S7h. 



