166 Psyche [October 
I believe, have been just as simple and useful had it been divided 
into the six genera formerly recognized. The preparation of a 
key for the large genus Liburnia was no small task and if Mr. 
Crawford has done this successfully it is something for which we 
will all feel grateful. 
I must call attention to a statement made by Kirkaldy some 
years ago and now repeated by Crawford: that Stal used Embolo- 
phora monoceros as the type of his new genus Liburnia. There 
is absolutely not one iota of foundation for this statement except 
the fact that Stal placed it as the first species of his new genus. 
As a matter of fact monoceros is the type of the entirely distinct 
genus, Embolophora, and can never be used as the type of Liburnia 
Stal. I have already shown (Bull. Buf. Soc. Nat Sci. X, p. 504, 
1912) that Liburnia Stal was simply a new name for Delphax Auct. 
(not of Fabr.) of which pellucida Fabr. should be the type. Del- 
phax striata Fabr. is the type of Delphax Latr. but Stal does not 
quote Delphax Latr. but Delphax Auct. and as striata seems to be 
an unrecognized species it is probably better to use pellucida, which 
is a well known form. 
TWO NEW SPECIES OF PLATYPEZA FOUND AT STAN-— 
FORD UNIVERSITY. 
By FRANKIE WILLARD, 
Stanford University. 
While making a study of the insect larvee living in mushrooms, 
I found an old cluster of Agaricus californicus which was infested 
with hundreds of small oblong larvee that were feeding on the soft 
fleshy portions of the plant at the base of the gills. Many other 
specimens were taken during the months of April and May, the 
dark gills of the mushrooms showing that the material was rather 
old. When these were placed in jars containing damp soil the 
larvee fed for several days in the mushrooms. Some then bored 
into the soil to pupate, others pupated on the surface under the 
fungus or in exposed places. The length of the larval period was 
not determined. Most of the insects remained in the pupal stage 
from seven to nine days, but some did not issue until the following 
