114 Annals Entomological Society of America [Vek Vv, 
In 1907 Schmiedeknecht* limited the tribe to only such > 
Cryptines as are entirely wingless in the 2 (none of which have 
an areolated metathorax), and have no scutellum in this sex. 
This reduces the tribe to the following known genera. 
Thaumatotypus Forster. 
Pezomachus Grav. 
Pezolochus Forster. 
all of which are represented in North America. 
Three species of the genus Pezomachus fall into a group so 
distinctive that I have proposed a sub-genus Mucromeson, 
herein described, to include them. 
The discarded genera of the tribe are now distributed as 
follows: . 
Cremnodes, A pterophygus and Theroscopus are now included 
in the genus Hemiteles Grav. and the genus Hemimachus is now 
-sunk in Pezomachus; while the species of A ptesis are included 
some in Microcryptus Ratz. and some in Hemiteles. 
There are no valid records of any of these genera, as they 
were then defined, being represented in America, with the pos- 
sible exception of Aptesis the two described American species 
of which must now probably be included in Microcryptus. The 
three species placed in the genus Cremnodes by Ashmead and 
Harrington must be transferred to Thaumatotypus, while of the 
four species placed by Ashmead in Theroscopus three, namely 
T. americanus, T. kukakensis and T. rufipes belong to the genus 
Pezomachus while the fourth, 7. popofensis was described from 
a single winged male and cannot therefore be, with certainty, 
placed in this genus. . 
The three genera of Pezomachini Schmied. can be separated 
as follows: 
1. Second abdominal segment very large covering 34 of the entire length of 
the hind body, connate with the third segment. Petiole much longer 
than ;the=metathoraxes je Saco cms eee emer Thaumatotypus Forst 
Second abdominal segment not covering*4 of the hind body, not connate 
with the third segment. Petiole rarely much longer than the metathorax. 2 
2wehace much abbreviatedircaiscimce cinch ne ene em eres Pezolochus Grav. 
Face: of normallengths i. 55 terns tee ie at ee eee Pezomachus Gravy. 
The subgenera of Pezomachus sens, lat. can be separated 
as follows: $ 
Prothorax much swollen in both sexes so that it is at least as long as the 
mesonotum along the median line. Petiole long and unusually slender. 
Subgenus Micromeson 
Prothorax not abnormally enlarged, shorter along median line than the 
mesonotum; petiole considerably expanded apically..Subgenus Pezomachus 
3Die Hymenopteren mitteleuropas. Gustav Fischer, Jena. (1906). 
