24 
Psyche 
[February 
In the collections of Prof. Aldrich and of the U. S. National 
Museum are specimens of four other species of Ochthiphila, 
identified by Coquillett and by Aldrich. These all include 
males, as will appear from Table II (which also includes 6 
European specimens from my own collection). In all four 
species the males have large conspicuous external claspers, and 
could not possibly be mistaken for females. This indicates 
that the failure to find males of 0. polysHgma is not due to failure 
to recognize them as males. 
Table II Relative abundance of the sexes in Ochthiphila. 
Species 9 (f 
0. aridella Fallen 11 11 
0. elegans Panzer 12 5 
0. geniculata Zetterstedt 1 1 
0. j uncorum Fallen 5 9 
A case very similar to the one just described occurs in Lon- 
choptera furcata Fallen. It was found by de Meijere (1906) 
that nearly all individuals of this species were females, and that 
these did not have sperm in their receptacles. In other Europ- 
ean species, such as L. lutea Panzer, both sexes occur in nearly 
equal numbers, and sperm is present in the receptacles. The 
extreme scarcity of males has been confirmed by Lundbeck 
(1916) for the European L. furcata, and by Aldrich (1918) for 
the American forms, which apparently belong to the same 
species. Aldrich was able to find only two American males of 
the genus (one from Ontario and one from Colorado), though he 
recorded 2652 females. 
I have myself collected numerous American specimens of 
Lonchoptera, and have examined the material in the American 
Museum of Natural History. Table III shows the result of this 
study. The five males that appear in the table, and two of the 
California females as well, appear to belong to a distinct species; 
all the others (except perhaps the Colorado female) are almost 
certainly L. furcata. I have several times obtained eggs from 
females of this species, and these have hatched into larvae; but in 
