HYMENOPTERA 



887 



Fig. 1 129. — Leg of an ant, and strigilis 

 enlarged. (From A. B. Comstock, Hand- 

 book of Nature Study.) 



comb-like, movable spur on the distal end of the fore_ tibia_ (Fig. 



1 1 29) and opposite this, on 

 the base of the metatarsus, a 

 concavity fringed with hairs. 

 In cleaning an antenna it is 

 drawn through the space be- 

 tween these two parts of the 

 strigilis. 



In addition to the terms 

 defined above the following 

 are used in descriptions of Hy- 

 menoptera. 



The malar space. — The area 

 on each side of the head includ- 

 ed between the proximal end of 

 the mandible and the ventral 

 end of the compound eye. 



The propodeum. — The first 

 abdominal segment when it 



forms a part of the alitrunk or wing-bearing region of the body. See 



characterization of the suborder Clistogastra. This is often called 



the epinotum by writers on ants. 



The parapsides or scapulce.- — In many Hymenoptera the prescutum 



of the mesothorax is prolonged backward to a greater or less extent; 



in some it extends a considerable 



distance toward the scutelliun 



but does not reach it (Fig. 1130, 



B) ; in others it reaches the scu- 



tellum dividing the scutimi into 



two parts (Fig. 1130, A); these 



separated halves of the scutum 



are commonly called the parap- 

 sides or scapulce. (Fig. 1130, par) 

 The parapsidal furrows or no- 



tauli. — The sutures separating the 



prescutum from the parapsides. 



(Fig. 1 130, p.f). 



The posterior lobes of the pro- 



notum. — A distinctly differenti- 

 ated rounded lobe, on each side 



covering the spiracle, which forms the lateral extension of the pro- 



notum of Sphecoidea. 



The prepectus. — An area along the cephalic margin oi the epi- 



stemtim of the mesothorax which in some Hymenoptera is separated 



by a suture-like furrow. 



The epicnemium.—This, is the same part as the prepectus. 



The cenchri. — A pair of membranous lobes or areas on the meta- 



notimi of all Chalastogastra. 



Fig. 1 130. — A. Mesonotum of Eury- 

 toma. B. Mesonotum of Cimbex. 

 (After Snodgrass.) psc, prescutum, 

 set, scutum, par, parapsides; p.f, 

 parapsidal iiu"rows. 



