162 Annals Entomological Society of America _[Vol. VII, . 
In order to fix permanently the taxonomic status of Musca, 
a comparative study must be made of Anthomyia pluvialis L., 
Calliphora erythrocephala Mg., Musca domestica L., the con- 
nectant forms and the main anthomyioid types, along the fol- 
lowing lines: 
(1) Chaetotaxy. 
(2) Pilotaxy—This term is coined to designate the dis- 
position of hairs and pile in the Diptera in general and the 
Muscoidea in particular. 
(3) Pleural and other external thoracic bee eh char- 
acters. 
(4) Venation. 
(5) Male reproductive system. 
(6) Female reproductive system. 
(7) Hypopygium. 
(8) Egg. 
(9) First-stage maggot. 
Lowne has worked out Calliphora erythrocephala quite 
extensively, and Hewitt has done the same for Musca domestica. 
Anthomyia pluvialis needs similar attention before exact 
comparisons can be instituted. As to male reproductive- 
system characters in the connectant and anthomyioid forms, 
Stomoxys has been worked out by Roubaud, and verified by 
others including the writer. Othellia, Haematobia, Hypodermodes 
and Morellia have been worked out by Thompson, the last two 
not yet published; Muscina, Synthesiomyia, Morellia, Limno- 
phora, Leucomelina, Fannia and Gen. Indet. have been worked 
out by the writer. In addition to these many nonconnectant 
muscoid forms have been investigated as to the male reproductive 
system by both Thompson and the writer, and Auchmeromyia 
and Choeromyia have been similarly worked out by Roubaud. 
All of the above named connectant and anthomyioid genera 
except Fannia agree with Musca in lacking the male accessory 
glands. Fannia and all the nonconnectant muscoid forms 
possess such glands, though they may be rudimentary in the 
higher forms. 
