162 
Psyche 
[September 
ous specimens of Tetracha Carolina (L.). My identification 
has been confirmed by Dr.. Walther Horn. T. angustata is 
similar to Carolina but is obviously more slender, a little 
less shining, lacks the rosy color at the base of the sutural 
region, and has the pale apical lunules of the elytra nar- 
rower, not distinctly expanded anteriorly. The subspecies 
has been known previously from Mexico to Costa Rica; 
the species affinis Dej. as a whole ranges to the Argentine. 
P. J. Darlington, Jr. 
The Males of Certain Priocnemis (Psammocharhle) 
Some twenty years ago in collecting I noted that certain 
fairly common species of Priocnemis were known only from 
females and that various species of the Agenia group were 
known only from males. I have never found any mating, 
but from field observations decided that Agenia pulchrina 
Cress, must be the male of Priocnemis nebulosus Dahlb. 
In talking with Mr. Rohwer about it and looking over the 
collection we concluded that A. dakota Cress, was the male 
of Priocnemis fulgifrous Cress. In recent years I have 
placed the common Agenia iridipennis Cress, as the male 
of the equally common Priocnemis pompilus Cress., and 
that the male of Priocnemis fortis Cress, is Agenia nigri- 
pilosa Cress. There are still some Priocnemis and Agenia 
unmatched. This makes it necessary to overlook the pres- 
ence and absence of tibial teeth as separating the two groups. 
It, however, is not surprising, as there is much variation 
in size of the teeth in those males of Priocnemis which have 
teeth; in some cases very small. Moreover in Pepsis and 
in Hemipepsis there is often a sexual difference in tibial 
armature. 
Nathan Banks. 
Metatrichia in New England (Scenopinhle) 
This genus is not listed in Johnson’s New England Dip- 
tera nor in the New York State List. It was described by 
Osten Sacken from Central Missouri. Last summer I took 
two specimens of M. bulbosa 0. S. at Holliston, Mass., on 
the flowers of yarrow, 17 July. 
Nathan Banks. 
