S I s 



A. E. Verrlll — The lierrniida Islands. 



Heteropsocus dispar Ver., sp. nov. Figures 192, 192«, 192i. 



This elegant little species was found in all stages of development 

 and in large numbers in the black, dry, decayed contents of an old 

 calabash fruit. The male has both pairs of wings longer than the 

 body, well developed and subequal, but the female has the fore 

 wings shorter than the abdomen and the under wings are lacking. 

 The dark brown markings on the fore wings are very conspicuous, 

 in the female forming a leaf dike or fern-like pattern, the dark brown 



Figure 192. — Heterojisocus dispar V. ; x 20 ; a, adult male : b, male nymph ; c, 

 adult female; d, nymph of female ; from drawings by A. H. V. 



color continuous centrally, but lobulated along each side, the lobes 

 alternating with clear marginal areas ; veins few, not reticulated ; 

 veins and margins of the wings are fringed with rather long hairs; 

 end of wings evenly rounded ; antennae dark, very long and slender, 

 equal to or exceeding the body, with 22-24 joints, the two basal ones 

 much thicker than the others ; legs long, brown ; tarsi three-jointed, 



192ft 194 



Figure 1926. — Heteropsocus dispar, x 8 ; a, male; b, b', adult females; e, e' , 

 nymphs. Phot, by A. H. V. Figure 194. — Book-louse, much enlarged ; 

 after Comstock. 



the proximal joints long, the others short, subequal; claws two, very 

 small. Head large, broad, rounded in front and wide posteriorly; 

 eyes large and prominent, black ; palpi clavate ; body thick, dark 

 brown or blackish, the thorax paler ; abdomen often black. Length 

 of largest females, about l mm . 



The nymphs are similar, but the body is lighter brown; the head 

 is rather narrower and the eyes less prominent. The male nj-mphs 



