HYMENOPTERA. 135 
Lyrops, Illig.—Ziris, Fab.—Larra, Jur. 
Where the antenne are filiform, where the third cubital cell is 
narrow, oblique, almost lunate, and the inner side of the mandibles 
offers a dentiform projection(1). 
Larra, Fab. 
Hardly differs from Lyrops except in the absence of teeth on the 
inner side of the mandibles, the equal distance between the eyes, and 
the evidently longer metathorax and abdomen(2). 
There, the superior wings have but two closed cubital cells, each 
of which receives a recurrent nervure. 
Dinertus, Jur. 
Where the two cubital cells are sessile. The antennz of the 
males are moniliform inferiorly, and then filiform. The mandibles 
are tridentated on the inner side, and the radial cell is furnished 
with an appendix(3). 
Miscopuus, Jur. 
Where the second cubital cell is petiolate and the radial offers no 
appendage. The antenne are filiform in both sexes. The inner 
side of the mandibles presents, at most, a slight projection(4). 
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 tri- 
angular or ovoido-conical, and becoming gradually narrower towards 
its extremity, and never placed ona long pedicle. The antenne are 
filiform and their first joint but slightly elongated. They are our 
NyssonEs. 
In some the eyes are entire. 
(1) Lat., Ibid., 71. 
(2) Lat., Ibid., 70. 
(3) Lat., Ibid., 72. 
(4) Lat., Gen. Crust. et Insect., IV, 72. 
