102 
Psyche 
[June 
Still a fourth member of this group is Olixon Cameron (’87) 
described from Panama and later redescribed by Kieffer (’ll) 
from Mexico, as Saphobethylus. Turner and Waterston (’17) 
have shown these two genera to be complete synonyms as the 
type species of both are identical. Cameron regarded Olixon as 
an anomalous Braconid, but thought that it showed resemblance 
to certain Bethylids, particularly on account of its greatly 
thickened fore legs. Kieffer placed Saphobethylus in the Bethy- 
lidse without question, but Turner and Waterston have referred 
the insect to the Rhopalosomatidae. 
All four genera are closely related, but are, I think, un- 
doubtedly separable on good characters. They may be distin- 
guished by means of the following key, which is based solely on 
the females, except in the case of Olixon. 
1. Second segment of abdomen much the longest 2 
Second segment of abdomen only a little longer than 
third, head transverse, vestigial wings present, reach- 
ing to base of abdomen, but without nervure; tarsal 
claws with a small subapical tooth . . .Olixon Cameron. 
2. Tegulse well developed; anterior wings present, but 
reduced in size and reaching to the tip of the propo- 
deum; antennse much longer than the head and 
thorax together, slender 3 
Tegulse and wings absent; antennse stout, barely as 
long as the head and thorax Algoa Brues 
3. Mandible with a long apical tooth and with three 
minute subapical teeth on the inner edge; head seen 
from above transverse. . . Harpagocryptus Bridwell 
Mandible with a long apical tooth, the inner teeth 
large and well-developed; head seen from above as 
long as broad Nealgoa gen. nov. 
Of the three genera, Algoa and Nealgoa are distinguished 
by a number of characters which are indicated in the generic 
diagnoses that follow; likewise Algoa and Harpagocryptus are 
separable by several clear-cut structural differences. Harpa- 
