1899] ENTOMOLOGICAL NEWS. 65 



Eobineau-Desvoidy in 1830, have not been accepted by all sub- 

 sequent writers on diptera. 



Macquart in 1834-1835 accepted Calliphora and Lucilia ; 

 Meigen in 1838 accepted Lucilia ; Zetterstedt in 1845-1849 

 and 1859 agreed with Meigen. Rondani in 1856 and 1862, 

 finding no characters on which to separate them, puts all three 

 in one genus, Mya or Somomya. Schiner in 1862 recognizes 

 Calliphora and Lucilia and includes Phonnia in the latter. 

 Finally at the present time Prof. Brauer accepts Calliphora 

 and Lucilia, but does not mention Phonnia. 



The fact is that a satisfactory characterization of these 

 genera is very difficult. Still, I believe that it can be found 

 in the arrangement of characteristic macro- and micro- chsetse 

 of the genae, thorax and third longitudinal vein of the wing. 

 To these characters I would add the form of that part of the 

 thorax which is caudad the transverse suture. To complete 

 the satisfactory distribution into genera of all the species of 

 this group known to me I must establish a fourth genus, which 

 I propose to call ProtocalUphora for the two species Musca 

 azurea Fall, and Musca chrysorrhcea Meig. 



I consider Phormia and ProtocalUphora as less highly de- 

 veloped, more primitive, than Lucilia and Calliphora, because 

 they combine characters of the latter and because their chae- 

 totaxy is less regular, more variable and the individual ma- 

 croch setae are frequently less well developed. The two former 

 have the thorax caudad the transverse suture distinctly flat- 

 tened, while in Lucilia and Calliphora no such flattening exists. 



In Lucilia and Calliphora the number of dorsocentral and 

 achrostical bristles caudad the suture is unvarying for any 

 species, and each individual macrochaeta is well developed. 

 In all the species that I have seen these dorsocentrals number 

 three and these achrosticals either two or three. 



In Phormia and ProtocalUphora the posterior dorsocentrals, 

 and achrosticals, one or both, vary in number or are poorly 

 developed. 



Calliphora.— Type C. vomitoria L. thorax not flattened, caudad 

 the transverse suture. In any sp cies the number of posterior dor- 

 socenti*al * and achrosticals is const^int, and both series consist of 

 well developed macrochaetae. Thegenae seen with an amplification 

 of twenty diameters are distinctly hairy. The third longitudinal 



