1899] ENTOMOLOGICAL NEWS. 65 



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

 sequent writers on diptera. 



Macqnart in 1834-1835 accepted Cullijtliora and Ludlia ; 

 Meigen in 1838 accepted Lucilia : Zetterstedt in 1845-1849 

 and 1859 agreed with Meigen. Roudani in lS5(i and 1862, 

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

 in one genus, Myaor N<> HUHIII/H. Schiner in 1862 recognizes 

 CallijrfnH'd and Lin-ilia and includes Phormia in the latter. 

 Finally at the present time Prof. Brauer accepts C<i//i/>/ior 

 and Liir!H, 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- cheetae 

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

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

 thorax which is candad 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 P>-o1<><-<iUii>ln>r for the two species Miinrti 

 <r. a red Fall, and MUNCH cln-t/Non'litnt Meig. 



I consider riioniiid and I'rotocdHi/i/iord as less highly de- 

 veloped, more primitive, than Luc/lid and Cd/lijtliord. because 

 they combine characters of the latter and because their chse- 

 totaxy is less regular, more \ariable and the individual ma 

 crochceta 1 are frequently less well developed. The two former 

 have the thorax candad the transverse suture distinctly flat- 

 tened, \\ liile iii Luc Hid and < 'n/liji/iorn no such Hat ten ing exists. 



In Liid/id and < 'd//i/>/>ord the number of dorsocent ral and 

 achroslical bristles caudad the suture is unvarying lor an\ 

 species, and each individual macrochu-ta is well developed. 

 In all the species that I have seen these dorsocent rals number 

 three and these achrosi icaU either two or three. 



In riioniiid and I'ro/ontl/i/i/inni the posterior dorsocent rals. 

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

 developed. 



Calltphora.Type ('. /-O////YO/VV/ L.thonix not flattened, caudad 

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

 socentrab aud achrosticals is const-int, and botli seric> ron>i-t of 

 well developed marrodueta 1 . Tlie geua? seen with an amplification 

 of twenty diameters are distinctly hairy. The third longitudinal 



