NO. 2008. NEW 8P1SCIE8 OF THYSANOPTERA—MOROAy. 39 



LEPTOTHRIPS RUSSELLI, new species. 



Figs. 72-75. 



Female. — Measurements: total body length about 1.9 mm. (speci- 

 men slightly distended); head, length 0.24 nam., width 0.17 mm.; 

 prothorax, length 0.14 mm., width through coxse 0.28 mm.; meso- 

 thorax, width at front angles 0.30 mm.; metathorax, width at articu- 

 lation with mesothorax 0.31 mm.; abdomen, width at second seg- 

 ment 0.30 mm.; tube, length 0.125, width at base 0.06, width at tip 

 four-sevenths of width at base. General color fuscous, shading to 

 brown on body in best cleared specimens. Abdomen with mdis- 

 tinct purplish pigmentation in the last segments. Relative lengths 

 of segments of antemiie: 



1 2^ _3_ _^ 5^ 6^ _7_ 8 



7 12 11.5 13.5 13 13 11.5 6 



Head, broadest just behind the eyes, converging slightly to articu- 

 lation with prothorax, sides very nearly straight, very indistinctly 

 roughened, bearmg a few mmute spines; a hump between the eyes 

 in front extending beyond and above the msertion of the antennae; 

 the posterior ocelli at the sides and on base of the hump cephalad 

 of the middle of the eyes, the anterior ocellus at the extremity of 

 the hump and directed forward. Dorsum faintly transversely 

 striated. Eyes large, occupying about two-tliirds the width of the 

 head, finely facetted; sparsely and minutely pilose, gray. Ocelli 

 much larger than facets of eye, posterior ones contiguous to eyes, 

 gray. Post-ocular spines long, stout, and blunt. Mouth cone 

 broad at the base, reachmg slightly past the middle of prosternum. 

 Sides of labrum nearly straight, labrum slightly constricted at the 

 tip; labium broadly rounded at the tip and overreaching the labrum. 

 Color of head, dark brown to fuscous. Antennae dark brown, seg- 

 ments one and two slightly the darkest, basal half of three some- 

 what lighter than the remamder of the antennae. Spines on antennal 

 segments small, sparse and light colored. Sense cones nearly straight, 

 transparent, located near tips of following segments: one on outer 

 surface of three ; two on each of segments four to six, one on the outer 

 and one on the inner side, the outer one on segment six only about 

 half as large as the other cones. 



Prothorax trapezoidal, sides nearly straight to hind angles, which 

 are abrupt. Spines at hind angles stout, prominent, and blunt; 

 spines at front angles distmct, short, stout, and blunt. Posterior 

 marginals intermediate in size between spines at fore and hind angles, 

 blunt. Midlaterals wanting. Anterior marginals very short, blunt, 

 visible only on lighter specmiens. Mesothorax with front margui 

 slightly convex, its front angles abrupt; a notch at each side just 

 caudad of front angle. Mesonotum broad, transverse, transversely 

 striate behind, its spmes minute. Metathorax broad, very slightly 



