66 MISCELLANEOUS PAPERS. 



Abdomen with segments 2, 3, and 4 widest and about equal; other 

 segments tapering evenly to base of tube. Tul)e long and slender 

 and about seven times as long as wide. Segments 2 to 7, inclusive, 

 each closed transversely striate, with a dark transverse line near 

 anterior border. Intersegmental membrane brown, with net struc- 

 ture. When the abdomen is distended the connecting tissue is almost 

 as wide as the segment itself. Segments each with twp or three 

 prominent spines on angles. 



Male: Head, length 0.58 mm., width 0.23 mm.; |)rothorax, length 

 0.23 mm., width 0.42.; metathorax, width 0.73 mm.; abdomen, width 

 0.72 mm. ; tube, length 0,63 mm., width 0.10 mm. ; clasper, length 0,66 

 mm.; tofal body, length \.<S(S mm. As long but somewhat smaller 

 than female. Wings present. A long tul)e-like clasper projects from 

 either side of segment 6; this is black at the base and shades to yellow- 

 brown, and on the tip it bears a short bull)-like hair. Segments 7 and 

 8 each have a similar though smaller side projection near the posterior 

 edge; the pair on segment 8 is the larger and is thumb-shaped. Scales 

 present, tube tipped with eight long, clear lemon-yellow hairs and 

 several smaller ones. Posterior half of abdomen and the tubes are 

 very dark brown. 



Dei^crihed fro)H two females and one male. 



Food plaid: Unknown. 



Habitat : Stanford l^niversity, Cal. 



11. Genus CRYPTOTHRIPS Uzel. 



(26) Cryptothrips californicus Daniel. 



Measureiiieitts: Head, length 0.26 nnn., width 0.16 mm.; prothorax, 

 length 0.15 nun., width, including prominent coxa, 0.25 nun.; meso- 

 tliorax, width 0.33 mm.; abdomen, width 0.38 mm.; total body, length 

 1.7 nnn. Antenna': 1, 21//; 2, 51//; 3, 75/<; 1, 69//; 5, 51/<; 6, l:5/i; 

 7, 12/<; 8, 27//; total, 0.35 mm. General color black, often dark 

 brown under the microscope, Avitli purple pigment. 



Head c^dindrical, one and one-half times as long as wide; front of 

 head strongly prominent between ])asal segments of antennae; sides 

 almost straight and parallel, roughened, converging only slightly pos- 

 teriorly; back of head transversely striate; head without conspicuous 

 spines, except a single one posterior to each eye. FAje^ large, promi- 

 nent, l)ut not protruding, with rather small facets; not pilose. Ocelli 

 situated far forward, anterior one on tip of prominent apex. 2loHth 

 cone broad at Imse, short, reaching onlj' a little past the middle of the 

 pronotum; maxillary palpi three-segmented and quite long and slender. 

 Antennae with eight segments, separated at base I)}" prominent pro- 

 longed vertex; segments 1 and 2 dark l)rown, unicolorous with head, 3 

 and base of 4 yellow, others shading brown toward the tip. 



