102 
BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 4, NO. 3. 
vein ending midway between the humeral cross-vein and tip of 
third vein. Furcation of third vein not very acute, the cell formed 
of moderate size. Fourth vein strongly curved basally and 
straight apically, ending closer to the wing tip than the fifth. Fifth 
and sixth sinuate. Seventh distinct. Halteres pale yellow. 
Described from four specimens representing both sexes, two 
collected in Wyandotte Cave, Indiana, received from Prof. J. M. 
Aldrich, and two others recently sent me by Pjof. C. F. Adams, 
who writes me that they were collected by Mr. A. M. Banta in 
Mayfields Cave, near Bloomington, Ind. Types in the collection 
of the Milwaukee Public Museum. 
Until recently I have considered this species to be only an 
extreme type of the variable A. nigriceps Loew, but a more care- 
ful examination leads me to believe that they are perfectly distinct. 
The front is much wider than in nigriceps, the legs are longer and 
more slender, and the palpi of the male are not at all enlarged. 
The hypopygial lamella is also much smaller. 
This is the only true cavernicolous form so far to be discovered 
in North America, and has previously been referred to several 
times. In the American Entomologist for 1880, Hubbard 
mentions the occurrence of larva belonging to a species 
of Phora found feeding on offal in Washington Hall, 
Mammoth Cave, Ky. He describes the larva and pupa, but gives 
no specific name to the species. Packard in his Cave Fauna (1) 
quotes Hubbard's observations, but gives nothing further. In 1896 
Aldrich (2) recorded as A. nigriceps Lw., what were presumably 
specimens from the lot here described from Wyandotte Cave, with 
the following note by Blatchley : "Taken from the mouldy 
remains of bread, chickens, etc., near the 'Augur Hole,' three- 
fourths of a mile from the mouth." 
This is the second cavernicolous Phorid to be described, the 
European Phora aptina being also an inhabitant of caves. This 
kilter species was found in the Adelsberg Grotto in Carniola, (3) 
and has been recently recorded by Bezzi (4) from the Covolo di 
Costozza near Venice in Italy. Bezzi considers the European 
species to be exclusively cavernicolous in occurrence, and the same 
is probably true of the American one here described. 
Public Museum, Milwaukee, June 15, 1906. 
(1) Mem. Nat. Acad. Sci., IV., p. 81 (1886). 
(2) On a Collection of Diptera from Indiana Caves, Eept. Indiana 
State Geologist for 1896. 
(3) [Schiner, Fauna d. Adelsberg Grotte (1853)]. 
(4) [Eivista Italiana di Speleologia, I, fasc. II (1903), p. 13]. 
