20 MISCELLANEOUS PAPERS. 



DESCRIPTION OP NEW SPECIES. 



Cryptothrips salicis new species. (PI. VI, figs. 1-3.) 



Measurements: Head, length 0.25 mm., width 0.11 mm.; pro- 

 thorax, length 0.23 mm., width 0.35 mm. (including coxae) ; meso- 

 thorax, width 0.33 mm.; abdomen, width 0.41 mm.; total body, 

 length 1.7 mm.; length of tube 0.116 mm. Antennae: Segment 1, 30/«; 

 2, 45^; 3, 59/z; 4, 63;<; 5, 54//; 6, 45//; 7, 48//; 8, 27/<; total length of 

 antennaB, 0.37 mm. 



General color dark yellowish brown. 



Head cylindrical, about twice as long as wide, somewhat prominent 

 between the basal segments of the antennae; sides nearly straight, 

 roughened, not pilose, shghtly converging posteriorly; head without 

 conspicuous spines except a single prominent Imobbed spme pos- 

 terior to each eye; three small spines in front of and one behind each 

 posterior ocellus. A set of three dark spots just posterior to the ocelli 

 and arranged similarly. 



Eyes large, promment, not protruding, not pilose; facets small, 

 outer ones brownish yellow, remainder of eyes brownish black. 

 Ocelli situated far forward; posterior ones contiguous to the inner 

 margins of the eyes, a little proximal to the middle; anterior one not 

 situated on extreme vertex but just distad of a line drawn tlirough 

 the extreme base of the first segments of the antennae. Mouth- 

 cone broad at the base, broadly rounded at the apex, short, extending 

 only to about one-third the length of the prosternum; maxillary 

 palpi quite long and slender. Antennx 8-segmented, separated at 

 the base by a slightly prominent vertex, unicolorous with head, 

 except segment 2, which is yellowish brown, segment 3, which is 

 hrownisli yellow, and segment 4, which is light hrown; segment 3 not 

 noticeably wealc. 



Prothorax large, about one-twelfth shorter than the head; sides 

 straight, extending outward posteriorly; a short, knobbed spine on 

 each anterior angle of prothorax and one long spine on posterior angle 

 of prothorax; also one long spine at the middle of each coxa and one 

 long spine on upper side of each coxa. Pterothorax considerably 

 narrower than abdomen; sides almost straight, narrowed abruptly 

 in front, gradually behind. Legs dark brown, thickly set with numer- 

 ous short spines; tibiae yellowish brown, short and stout; front 

 femora noticeably thicTcened; fore coxae greatly enlarged. Wings fully 

 developed, extending to seventh abdominal segment, shghtly nar- 

 rowed in the middle; both pairs clear and with single fringe except 

 four or five hairs near tip on fore wings, which are double-fringed. 



Abdomen long and robust, nearly two and one-half times as long 

 as wide; sides nearly straight to segment 7, wliich is gradually nar- 

 rowed; segments 8 and 9 abruptly narrowed; segment 10 (the tube) 



