202 CRABRONIDE. 
The ¢ does not differ except in having the silvery pubescence 
much thicker on the lower part of the face. 
$ @ in my own Collection. 
+4:+ Although the differences are slight which separate 
this from the preceding species, yet they are uniform in 
the sexes, and unvarying in the great number of both 
which I have examined. It is equally common, and found 
in similar situations. 
B. Either three or four submarginal cells complete. 
a. Antennz filiform, mandibles strong, tridentate in ¢. 
Genus XXVIII.—Mettimuvs. Fab. 
Heap large, transverse, vertical; eyes large, oval, distant ; 
stemmata seated on the vertex towards the front; antenne 
inserted in the lower portion of the face, towards the clypeus,’ 
distant at their base, filiform, somewhat thicker in the 2, the 
scape subobconic; the clypeus transverse, rounded in front, 
armed in the centre of its anterior margin with three dentate 
processes ; labrum transverse, linear, concealed ; the mandibles 
tridentate in the ?, bidentate in the 6, the apical tooth acu- 
minate, and much advanced beyond the others. The tHorax 
ovate; the collar transverse; the scutellum subquadrate; the 
metathorax obtuse, with an ovate plane space at its base, en- 
closed by a smooth frame ; the superior wings mith one mar- 
ginal cell, elongate and narrow, and four submarginal cells, the 
first oblong, and as large as the two following, receiving the 
first recurrent nervure near its junction nith the second, which is 
much narrowed towards the marginal, the third also slightly so, 
and receiving near its commencement the second recurrent ner- 
vure, the fourth reaching the apex of the ning; the legs 
slender, moderate, subspinose. The aspomeEn lanceolate, 
the first segment prolonged into a very long petiole, nodose 
