THE WINGS OF MYRMELEONIDM 



199 



wing represented by Figure 194 a somewhat different condition exists; in 

 this wing trachea Cui and M3+4 extend closely parallel in the same vein 



Fig. 194. — Detail of a pupal wing of a myrmelconid showing union of 

 tracheae M3+4 and Cui. 



cavity. In this case the serial vein consists of three differing sections; the 

 basal part of this vein extending from the cubital fork to the point where it 



Fig. 195. — Tracheation of the wings of a pupa of a myrmelconid. 



is joined by the oblique vein is simply vein Cui ; then follows a section in 

 which this vein is compound, consisting of veins Cui and ^U+i united; 



