HYMENOPTERA. 247 
pendage. The antennz are filiform in both sexes. The inner side 
of the mandibles presents, at most, a slight projection *. 
6. We now come to Fossores, in which the labrum is also com- 
pletely or partially hidden, where the maxille and labium form no 
proboscis, where the inner side of the mandibles exhibits no emar- 
gination, where the head is of an ordinary size, the abdomen is trian- 
gular or ovoido-conical, and becoming gradually narrower towards 
its extremity, and never placed on a long pedicle. The antenne are 
filiform and their first joint but slightly elongated. They are our 
Nyssones. 
In some the eyes are entire. 
Astata, Lat—Dimorpaa, Jur., 
Where there are three closed cubital cells, all sessile, the second of 
which receives the two recurrent nervures; the radial has an appen- 
dix, the extremity of the mandibles are bifid, and the eyes closely ap- 
proximated superiorly t. 
Nysson, Lat., Jur., 
Where the superior wings also have the same number of cubital 
cells, but where the sccond is petiolate, and where the radial has no 
appendix. The mandibles terminate in a simple point and the eyes 
are distant f. 
Oxyse.us, Lat., Jur., Oliv., 
Where there is but one closed cubital cell, receiving a single recur- 
rent nervure. The antenne are short and contorted, and the second 
joint is much shorter than the third. The mandibles terminate in a 
simple point. The scutellum offers one or three dentiform points. 
The tibiz are spinous, and the extremity of the tarsi presents a large 
pellet. The females make their nests in the sand, and provision their 
larvee with the bodies of Muscides §. 
Nites, Lat., 
Likewise with but one closed cubital cell, but where the antennz are 
longer, almost straight, and their second and third joints are of equal 
length. The mandibles terminate in two teeth; there are neither 
points on the scutellum nor spines on the tibiae; the tarsial pellet is 
very small |]. 
The eyes are emarginated in others, as in 
Pison, Spin., Lat., 
Three closed cubital cells in the superior wings, the second very 
small, petiolate, and receiving the two recurrent nervures, a charac- 
ter which approximates the subgenus to Nysson 4. 
7. The last division of the Fossores, that of the CraBronirEs, only 
differs from the preceding one, inasmuch as these Insects, which 
* Lat., Gen. Crust. et Insect., IV, 72. 
+ Lat., Ibid. 67. 
+ Lat., Ibid. 90. 
§ Lat., Ibid., 77 ; Encyc. Méthod. article Owibéle. 
|| Lat., Gen. Crust. et Insect., IV, 77. 
4] Lat., Ibid., 75, genus Tachybulus; and_387, genus Pison of Spinola, and not of 
Jurine, 
