NEUEOPTERA— TERMITINA. HI 



feeble, so as only to appear under favorable circumstances, being visible 

 in only half of the specimens before me. The subniarg-inal vein of the 

 front wing terminates at about the 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. insignis, and has five or six superior branches on the hind wing, six or 

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

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

 the vving, but when there are but six branches (which appears to be less 

 conuuonly the case) the first originates at a greater distance from the base; 

 on the hind wing there is greater irregularity ; in one specimen, that fig- 

 ured (No. 8616), there are five branches on the left hind wing, the first orig- 

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

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

 half of the wing ; in another specimen with only five veins (No. 8250) the 

 basal branch originates somewhat beyond the middle of the basal half of 

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

 there are 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 

 beyond the middle of the wing, the basal ones of which appear to be 

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

 deflected towards the lower margin. Nothing can be said of the interno- 

 median vein. 



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

 rounder head, diff'erently shaped wings, more longitudinally disposed 

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



Length of body, 10.5-12, av. 11"'"; breadth of thorax, 2.1°""; of abdo- 

 men, 2.6""" ; length of antennae, 4"'" ; of front wing, 13.5-15.5, av. 14""' ; 

 breadth of same, 3.35'""' ; length of middle tibia, 1.65""' ; of abdominal 

 appendages, 0.65'°". 



