210 CRABRONIDE. 
indicated; the legs moderately long, and having generally a 
very large pulvillus between their terminal bifid claw. The 
ABDOMEN ovato-conic, much curved at its extremity, and the 
second ventral segment, in some species, produced in front and 
at right angles with its plane. 
Type, G. mystaceus. Lin. 
+4+ The etymology of the name is probably ywpuris, in 
obscure allusion perhaps to the arcuation of the antenne ; 
it was established by Latreille in his ‘ Histoire,’ tom. xiii. 
[ am here again, as in the genus Crabro, obliged to reduce 
the genera established by St. Fargeau, from Latreille’s 
genus Gorytes, to specific synonymes, as I conceive, with 
one exception only, (see the observations under the genus 
Arpactus), that he has subdivided them upon false premises 
and too nice a distinction of recondite and trifling differ- 
ences. With respect to the former, in accordance with his 
theory of parasitism founded upon the presence or absence 
of cilia to the anterior tarsi, and lateral spines to the posterior 
tibia, he was induced to consider it incongruous that the 
same genus should contain both the parasite and the insect 
upon which it is parasitic. This, it is true, appears plausible, 
and were it substantiated might justify an anxious search 
for characters to support a subdivision. But when expe- 
rience teaches us that the supposed parasites are predatory, 
as I have found to be the casein both of our species which 
from structure were considered parasites, I think it more 
rational to proceed upon the uniform principle adopted, than 
to introduce hypercritical distinctions in one or two genera, 
when every genus which consists of three or four, or more, 
species would equally and as rationally admit of sub- 
division. Such a procedure has the effect of making 
obscure what sound generic separation tends to facilitate. 
