HVMENOPTERA. 449 



These Insects, which are tolerably large, more particularly inhabit the 

 Pine forests of cold and mountainous countries, produce in flying a hum- 

 ming like that of a Bombus, &c., and in certain seasons have appeared in 

 auch numbers as to strike the people with terror. 



FAMILY II. 



PUPIVORA(l). 



In the second family of the Hymenoptera we find the abdomen 

 attached to the thorax by a simple portion of its transversal diame- 

 ter, and even most frequently by a very small thread or pedicle, in 

 such a manner that its insertion is very distinct, and that it moves 

 on that part of the body. The females are provided with an ovi- 

 positor. 



The larvae are destitute of feet and mostly parasitical and carni- 

 vorous. 



I divide this family into six tribes. 



In the first, that of the Evaniajles, Lat., the wings are Veined) 

 and the superior ones, at least, are lobatej the antennae filiform or 

 setaceous, and composed of thirteen or fourteen joints; the mandi- 

 bles dentated on the inner side; the maxillary palpi composed of six 

 joints, and the labials of four. The abdomen is implanted on the 

 thorax, in several under the scutellum, and has an ovipositor usually 

 salient and formed of three filaments. 



This tribe appears to form but the single genus 



FCENXJS. 



Sometimes the ovipositor is concealed, or but very slightly salient, and 

 resembles a little sting. The ligula is trifid, a character which approximates 

 these Insects to the preceding Hymenoptera. 



In the second tribe, that of the Ichneumonides, the wings are 

 also veined, the superior ones always presenting complete or closed 

 cells in their disk. The abdomen originates between the two pos- 

 terior legs. The antennae are generally filiform or setaceous, rarely 

 clavate, vibratile, and multiarticulated, being composed of sixteen 

 joints at least. In most of them the mandibles have no tooth on the 



(1) PupK-eaters. 

 3G 



