1936 ] 
Notes on Some Hydropsy chidae 
127 
the others of the scalaris group, with larger, fewer pale 
spots, and eyes of male wider apart than the diameter of 
an eye. 
Following Ulmer, Martynov, Mosely, Navas, and Betten I 
am separating Cheumatopsyche (that is the Hy dropsy - 
chodes of these authors) on the character used by Betten, 
the position of certain cross-veins; this appears to be con- 
stant. 
Mosely informs me that the type species of Hydropsy- 
chodes has no closed median cell, and that Ulmer’s figure 
is wrong; in any event Cheumatopsyche is an older name. 
Another case is where I am credited with putting H. 
dubitans as a synonym of N. crepuscular is, although I had 
simply followed the statement of McLachlan (Revision Eu- 
ropean Trichoptera, p. 393, 1878) who had seen the types 
of both names. As to Walker’s: Polycentropus crassicornis , 
put as a synonym of N. crepuscularis, I examined a type in 
1912 and saw that it was a Phylocentropus. Mr. Mosely in- 
forms me there are four types in the series, two (a male 
and female) of a Plectrocnemia, one female of a Phylocen- 
tropus, and one male of a Neureclipsis. 
Mosley thinks (and I agree) that the name should be kept 
for the Plectrocnemia, and I select as lectotype of Polycen- 
tropus crassicornis Walk, a male in the type series which 
is a Plectrocnemia; all types are from Georgia. 
Milne lumps under H. scalaris about all the forms that 
have the same general structure of the penis, ignoring fur- 
ther differences. In the male type of H. scalaris the apical 
joint of the clasper has a distinct hook at the end; the eyes 
of the male, although larger than in the female, are wider 
apart than the width of an eye. Betten, in sinking my H. 
hageni, has called attention to Hagen’s statement that the 
eyes of the male scalaris were larger than the female. This 
is but a half-truth, for Hagen also says after the descrip- 
ton that he has a male with still larger eyes, and adds “Is 
it different?”. 
I have selected and marked as lectotype of Hydropsyche 
scalaris Hagen a male from “St. Lorenz, Canada, Sacken.” 
H. hageni is smaller and darker than H. scalaris, the male 
