﻿The Life History of Two Species of Nahidae 155 



arched, the segments easily determined, each bearing four hairs 

 similar in arrangement to those on the thorax, the outermost row 

 arising from spiracles along the margins, the sixth segment having 

 the largest spiracles and the longest hairs; three large light spots 

 on central dorsum of segments three, four and five respectively ; 

 eyes large, semi-circular in outline as seen from the side, coarsely 

 gianulated, and reddish broT\Ti in color ; two prominent hairs on 

 dorsum of head above eyes ; antennae about twice as long as body, 

 hairy, the segments being longer successively as they approach 

 the distal end ; base of antennae dark, dark streak extending nearly 

 to eye; first antennal segment with dark streak beneath and black 

 ring at distal end; prothoracic femora well-developed, with row 

 of teeth along inner side, each giving rise to a hair-like bristle, 

 and a similar row on A^entral side, also dark subapical spots ; meso- 

 thoracic femora hairy and with dusky, subapical spots; meta- 

 thoracic femora with six long hairs along inner side and red 

 apical ring; all tibia hairy; tarsi with thin covering of hairs and 

 darkened at outer end. 



As the nymphs grow older the body becomes yellowish-white in 

 color, also the legs ; brownish streaks appear on disc of thorax 

 near lateral margins ; lateral edges of abdomen become compressed ; 

 central area, brownish ; third segment pigmented and well-defined 

 at edges. 



Second Instar 



Length at beginning of second instar is about 2.58 mm., and 

 form assuming more that of mature nabid; translucent to color- 

 less at first; antennae a little longer than body; proboscis with 

 dark central streak and extending beyond mesothoracic coxae ; 

 thoracic terga greenish in color and not extending to lateral mar- 

 gins; pleural region of thorax dusky, a white streak running 

 between this region and the dorsal terga ; ventral portion of 

 abdomen becoming well rounded, lateral edges unpigmented and 

 prominent; small black spots at bases of teeth on first and second 

 femora. 



At the end of the instar the streaks along dorsal margins of the 

 thorax become brownish ; central areas of second and third abdom- 

 inal segments olive-green ; third and fourth segments with patches 

 of green ; red spots on third segment and a few irregular dashes 

 of red on central dorsum of segments three, four and five; dorsal 

 terga of abdomen not reaching to lateral margins; spots notice- 

 able on metathoracic tibia; terminal segment reddish. 



Third Instar 



Length of nymph about 2.87 mm. ; body longer in proportion to 

 width than in second instar; antennae about one-quarter longer 

 than body; tylus dusky at sides; two distinct dusky lines appear- 

 ing on dorsum of head; dusky design beginning on disc of pro- 

 thorax; mid-dorsum of first and second abdominal segments with 



