136 ' INSECTA. 
Astata, Lat.—Dimorpha, Jur. 
Where there are three closed cubital cells, all sessile, the second 
of which receives the two recurrent nervures; the radial has an ap- 
pendix, the extremity of the mandibles are bifid, and the eyes closely 
approximated superiorly(1). 
Nysson, Lat. Jur. 
Where the superior wings also have the same number of cubital 
cells, but where the second is petiolate, and where the radial has no 
appendix. The mandibles terminate in a simple point and the eyes 
are distant(2). 
OxyBELus, Lat. Jur. Oliv. 
Where there is but one closed cubital cell, receiving a single re- 
current nervure. ‘The antennze are short and contorted, and the 
second joint is much shorter than the third. The mandibles termi- 
nate in a simple point. The scutellum offers one or three dentiform 
points. The tibiz are spinous, and the extremity of the tarsi pre- 
sents a large pellet. The females make their nests in the sand, and 
provision their larve with the bodies of Muscides(3). 
5 Nireta, Lat. 
Likewise with but one closed cubital cell, but where the antenne 
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 tibiz; the tarsial 
pellet is very small(4). 
The eyes are emarginated in others, as in 
Prison, Spin. Lat. 
Three closed cubital cells in the superior wings, the second very 
(1) Lat., Ibid., 67. 
(2) Lat., Ibid., 90. 
(3) Lat., Ibid, 77; Encyc. Méthod., article Oxibele. 
(4) Lat., Gen. Crust. et Insect., IV, 77. 
