308 



THE CANADIAN ENTOMOLOGIST. 



briefly spinose ; vertex transverse ; postocular spines present, pointed. 

 Eyes moderately large, not protruding, occupying the anterior angles of 

 head. Ocelli small, about equal in size to facets of eyes ; anterior ocellus 

 not overhanging ; posterior ocelli opposite centres of eyes, slightly 

 separated from their inner margins. Antennae eight-segmented, general 

 colour black ; segment 2 paler at apex ; segment 3 with two transverse 



brownish-yellow bands, one at base, the 

 other at middle ; segments 3-6 sub- 

 clavate ; segment 7 oblong, pedicellate ; 

 segment 8 small, fusiform. Mouth-cone 

 slightly wider than long, reaching about 

 four-fifths across prosternum, apex 

 broadly rounded. 



Prothorax about three-fourths as long 

 as width of head, and (including coxae) 

 slightly more than twice as wide as long ; 

 usual spines all present, the two pairs 

 near the posterior angles much the 

 longest ; anterior marginals very small. 

 Pterothorax almost twice as wide as long, 

 slightly wider than prothorax ; sides 

 subparallel. Wings lacking. Legs 

 nearly concolorous with body, tarsi somewhat lighter j anterior tarsus 

 unarmed. - 



Abdomen moderately stout, about one and one-half times as broad as 

 pterothorax, widest at about segment 3, from which it tapers evenly to 

 segment 6, and then rather abruptly to base of tube. Tube 

 slightly less than three-fourths as long as head, tapering almost 

 evenly from base to apex ; surface not spinose. 



Measurements: Total length, 2.74 mm.; head, length, 

 .37 mm.; width, .26 mm.; prothorax, length, .20 mm ; width 

 (including coxae), .42 mm.; pterothorax, width, .46 mm.; 

 abdomen, width, .64 mm.; tube, length, .26 mm.; width at 

 base, .10 mm.; at apex, .05 mm. Antennae: i, 6i/x; 2, 73/x; 

 3, 98/x ; 4, 90/x ; 5, 87/x ; 6, 78/x ; 7, 55/x ; 8, 42/x. Total, .58 mm. 



Male. — Smaller than female (total length about 1.83 mm ). Anterior 

 femur slightly swollen ; fore tarsus armed with a stout tooth. Tube twice 

 as long as its greatest basal width, and two-thirds the length of head, 



Fig. 18. — Cryptothrips rectangularis. 



Fig. 19 — C. 

 rectangfularis 



