April, '06] 



ENTOMOLOGICAL NEWS. 



119 



to decide, but when we compare it with the hind wing, where 

 the radial sector is distinct, we see the magnitude of the 

 change. The cross- vein connecting r x with r 4 in the hind wing, 

 Fig. 8, suggests 

 that the change has 

 been brought about 

 by shifting of the 

 trachea from longi- 

 tudinal to cross 

 veins — many tra- 

 cheae are found mis- 

 placed in the pupa, 

 and this change might easily occur — the change would then be 

 coalescence and not fission, as can be easily understood by 

 studying the accompanying figures of the fore and hind wings. 

 The sub-costa and r x run nearly parallel to the end of the wing. 

 In Polystoechotes punctatus, V\%. 9, R\ by pectinate brach- 



Fig. 8. — Micromus posticus. Hind wing. 



Fig. 9. — Polystoechotes punctatus. Fore wing. 



ing, gives rise to* fourteen veinlets, each of which subdivides 

 twice. Ctc 1 has seven such branches. The sub-costa and r l 

 fuse at the pterostigma and give rise to fifteen such veinlets. 



MANTISPID^. 

 In Mantispa interrupta, Figs. 10 and 11, the sub-costa runs 



through the middle 

 of the pterostigma 

 for the last third of 

 its course, and dis- 

 appears near i t s 



end. The base of 

 Fig. 10. — Mantispa mterrupta. Fore wing. 



