SUBFAMILY CHRYSOMYINAE 127 
4:200, 1893; Riley and Howard, Insect Life 6:56, 1896; 
Ward, West. Med. Rev. 12 (12) :483-485, 1907; Johnson, 
Psyche 15:60, 1908; Lahille, Bol. Dir. Gen. Ganad. Min. 
Agric. Buenos Aires, 1915. 
Cochliomyia macellaria (Fabricius) Shannon and Del Ponte, 
Inst. Bact. [Argentina], Rev. 4 (5) :566, 1926; Aguirre, 
Soe. Argentina Patag. Reg. Norte Tucuman, 7 Reun., 2: 
797, 1931; Reed, Chile Nat. Hist. Rev. 36:143, 1932; Be- 
quaert, Carnegie Inst. Wash., Pub. 481:565, 19338; Del 
Ponte, Soe. Biol. Montevideo Arch., sup. 5:1299-1301, 1930. 
It has been very difficult to decide upon the correct name for 
this important species of blowfly. The name that may ultimate- 
ly be used is possibly one of the five proposed by Robineau- 
Desvoidy which are questioned. According to Séguy, who had 
been provided with a copy of the key presented in this paper, 
the type specimens of those species run to americana, two defi- 
nitely so, three questionably, but since the genitalia of these 
types were not inspected, the specimens may not have been 
correctly identified. The type of Lucilia hominworax was run 
by Séguy to Hemilucilia flavifacies Engel in the same key; but 
the biology of the species, as given by Coquerel, seems to indi- 
cate a species of Callitroga and, since other authors have placed 
the name here, I leave it in the above list with a query. The 
only name fully available at the present time for this species is 
fulvobarbata Bigot, but this is not accepted here because it ap- 
pears almost certain that earlier names will be found available. 
M. Séguy informs me that the type specimens of the species 
marked with an asterisk are in poor condition but that they may 
be questionably determined as this species. 
The biological information given in the references included 
above under the name macellaria (F.) seems to indicate that 
americana is the species under consideration. It has been vir- 
tually impossible to straighten out all references in the economic 
entomological and medical literature dealing with North Ameri- 
can screwworms although an attempt has been made to do so. 
Specimens of flies reared from maggots collected in connection 
with cases of subeutaneous myiasis in which the clinical history 
indicates ‘‘unclean,’’ ‘‘cattarrhal,’’ or ‘‘pustular’’ lesions, would 
seem to suggest that some other species of blowfly was involved, 
for americana does not normally occur under such conditions. 
Cases of subcutaneous myiasis in northeastern North America 
are usually caused by larvae of Wohlfahrtia vigil (Walker) and 
those in northwestern North America by Wohlfahrtia opaca 
