THE WING OF RAPHIDIID.^ 



171 



Figure 165 represents a wing of a pupa of Chauliodes pectinicornis, taken 

 at the stage when the forming wing- veins appear as pale bands ; and Figure 

 166 represents the tracheation of a wing of a pupa of Corydalns cornutus. 



3d A 2d A 



Cui CUia 



Fig. 166. — Tracheation of a wing of a pupa of Corvdalus 

 cornutus (After C. &• N.). 



These figtires are from Comstock and Needham, but with a change in the 

 lettering of the branches of the radial sector. The homologies of the wing- 

 veins are indicated by the lettering of the figures and require no discussion 

 except in the case of the branches of the radial sector, where there may be a 

 difference of opinion, depending on the view held regarding the method by 

 which the dichotomy of the sector has been suppressed. This has been 

 discussed on an earlier page. 



(d) THE WINGS OF THE RAPHIDIID^ 



As no account of the tracheation of the wings of any pupa belonging to 

 the RaphidiidcB has been published, we are forced to base our conclusions 

 regarding the homologies of the wing-veins in this family upon a study of 

 the wings of adults. 



Of the two genera belonging to this family, Inocellia appears to be the 

 more generalized, as regards the structure of the wings. The wings of 

 Inocellia longicornis are figured here (Fig. 167). 



In both genera, the subcosta ends in the costal margin of the wing a 

 short distance before the pterostigma; the pterostigma is definitely limited, 

 and conspicuous; the humeral vein is not recurrent, but sometimes it is 

 forked; and the costal area of the wing is more or less widened in the 

 proximal half of the wing. 



In Inocellia there is no indication of a tendency to form a pectinately 

 branched radial sector, the dichotomous branching of this vein being 

 obvious. The forks of veins R2+3 and R 4+5 are nearly opposite each 

 other; and both are quite near the margin of the wing. The tip of vein 

 Ri and of some of the branches of the radial sector bear short marginal 

 accessory veins; but these differ in number in the wings of the two sides 

 of the same indi\-idual. 



