CRAWFORD, THYSANOPTERA OF SOUTHERN CALIFORNIA 151 



reaching about three-fifths the length of prothorax, blunt at tip and distinctly 

 tipped with black; maxillary palpi three-segmented. Antenns (Fig. 62 Cj 

 apparently nine-segmented, about twice as long as head, slender, sparsely, briefly 

 and indistinctly spinose ; with a sense cone on segment III, and a bifurcate one 

 en IV ; II subglobose, III pedicellate, VI with a very distinct suture apically, 

 which appears to be as true a joint as either of the joints of the style ; style 

 rather long and slender; basal segments very light, apical segments darker. 



Prothorax (Fig. 62 A) subrectangular, about as long as head and three- 

 fourths as long as broad ; with one comparatively long transparent and indis- 

 tinct spine at each posterior angle, several shorter ones on posterior margin, 

 and two very small ones on each anterior angle. Legs medium in length, 

 very sparsely spinose; tarsi unarmed. Wings (Fig. 62 D) long, slender, ex- 

 tending one-fourth the abdomen's length beyond tip of abdomen, very light 

 brown, almost transparent, with a small clear area near base ; veins rather prom- 

 inent, posterior vein appearing close after basal clear spot ; anterior vein with 

 twelve spines, three on apical half; posterior vein with nine equidistant spines; 

 anterior margin with a row of twenty-nine short spines ; posterior marginal 

 fringe moderately short, all spines and cilia very inconspicuous. Posterior 

 wings shorter, entirely transparent, with a fringe on both sides. 



Abdomen usually rather stout, fully half as broad as long, pointed at 

 tip; occasionally the abdomen is longer and more slender, and only one-third 

 as broad as long, and in such forms the wings only slightly over-reach the 

 abdomen ; broadest across segments five and six, tapering uniformly from six 

 to ten; anal segment (Fig. 62 B) rounded at tip; abdominal spines few, and 

 short ; anal spines very short and almost transparent. This species apparently 

 is not saltatory. 



Measurements: Head, length .11 mm., width .13 mm.; prothorax, length 

 .12 mm., width .16 mm.; pterothorax, width across mesocoxae .21 mm.; abdo- 

 men, length .42 mm., occasionally about .66 mm., width .24 mm. ; total length 

 about .96 mm. (.84 — 1.11). Antenna: I, .022 mm.; II, .032 mm.; Ill, .040 

 mm. ; IV, .041 mm. ; V, .038 mm. ; VI, .041 — .010 mm. ; VII, .011 mm. ; VIII, 

 .014 mm ; total .25 mm. 



Described from several females (two of which have the longer abdomen), 

 taken from olive foliage infested with black scale (Saissctia oleae). It has 

 not been determined yet whether or not this species has any definite relation 

 to the scale insect ; a few specimens have been found also on the foliage of 

 common pine. 



Locality: Claremont, Cal. (Crawford). 



Although the current description of Aiiaphothrips precludes spines on 

 posterior angles of prothorax, and the genus Scirtothrips Shull was erected 

 for a certain species having such spines, nevertheless, I believe that without a 

 doubt this species belongs in the genus Aiiaphothrips. The obvious and un- 

 mistakable similarity to A. striatiis Osborn places it beyond doubt in the closest 

 generic relationship with that species, at least, but whether a genus charac- 

 terized by the apparent division of the sixth antennal segment should be 

 erected might be a question of fair discussion ; be that as it may, it is evident 



