NEUROPTERA TERMITINA. 1 1 1 



fee I ile, so as only to appear under favorable circumstances, being visible 

 in only halt' of tin- .specimens before me. The submarginal vein of the 

 trout wing terminates at about tin- middle of the basal half of the wing, 

 and about opposite the origin of the first superior scapular branch. The 

 mediastinal vein extends about to the middle of the wing both in the front 

 and-hind wings. The scapular vein is related to the margin exactly as in 

 P. hiMgnis, and lias I'm- or six superior branches on the hind wing, six or 

 seven on the front win- ; on the front wing they originate at subequal dis- 

 tances apart, commencing usually at about the middle of the basal half of 

 the \\ini:. but when then- an- hut six branches (which appears to be less 

 commonly tin- case) tin- iirM originates at a givater distance from the base; 

 on the hind wing there i> ^renter irregularity : in one specimen, that fig- 

 ured Xo. s <i 1 i! ), there are live hranchfs on the left hind wing, the first orig- 

 inating beyond the middle of tin- wing, while on the right wing there is an 

 additional vein, originating far before tin- second, at the middle of the basal 

 halt' of the wing; in another specimen with only ti\e \eins (No. 8250) the 



ba>al branch originates somewhat bey 1 the middle of the basal half of 



the wing, and the others follow at subequal intervals ; besides these superior 

 there aYe two inferior nervules arising, the first at the end of the middle 

 third of the wing, opposite a superior branch, and the second opposite the 

 succeeding branch; sometimes a third vein appears beyond these; after 

 parting from the scapular vein these take a longitudinal course and termi- 

 nate at the tip of the wing. The externomedian vein runs subparallel to 

 the scapular, diverging slightly from it and being as far from it as it is from 

 the costal margin ; it emits two or three inferior branches, the last scarcely 

 he\ond the middle of the wing, the basal ones of which appear to be 

 forked, but all having an unusually longitudinal course, being onlv slightly 

 deflected towards the lower margin. Xothing can be said of the interno- 

 median vein. 



This species differs from P. insignia by its more laterally disposed eyes, 

 rounder head, differently shaped wings, more longitudinally disposed 

 branches of the externomedian vein, and longer and narrower abdomen. 



Length of body, 10.5-12, av. 1 l mn ' : breadth of thorax, 2.1 mm ; of abdo- 

 men, 2.6 mm ; length of antenna, 4 mm ; of front wing, 13.5-15.5, av. 14 auu ; 

 l.re.-idth of same, 3.35 mm ; length of middle tibia, 1.65 mm ; of abdominal 

 appendages, 0.65 mm . 



