CRAWFORD, SOME NEW THYSANOPTERA FROM SOUTHERN CALIFORNIA 105 



Euthrips ininutus var. setosus n. var. 



The specimens of this variety resemble very closely Euthrips miniitus, 

 Moulton, but possess several distinctive characters, which, however, are hardly 

 of specific value. In the description, only the diagnostic characters will be 

 mentioned. 



Anterior margin of head ( Fig. 47 A ) with distinct notched prolongation 

 of vertex between insertion of antennae. Antennae ( Fig. 47 F ) nearly three 

 times as long as head. 



Prothorax (Fig. 47 A) with anterior margin reticulate; two spines on each 

 anterior angle ; four long spines on posterior margin ; without a spine on lateral 

 side of posterior angle, .\nterior margin of wing (Fig. 47 G) with twenty- 

 two spines ; fore vein with nineteen spines ; hind vein with fourteen. 



Abdomen ( Fig. 47 B ) with two conspicuous spines on each side of every 

 segment, and two on the dorsal surface of each segment. 



Measurements: Head, length .076 mm., width .14 mm. ; prothorax, length 

 .125 mm,, width .18 mm. : mesothorax, width .24 mm. ; abdomen, width .29 mm. ; 

 total length 1.28 mm. (.91 - 1.65 mm.). Antennae: I .015 mm.. II .032 mm.. 

 Ill .035 mm., IV .039 mm., V .030 mm., VI .041 mm., VII .08 mm., VIII .013 

 mm. ; total .28 mm. Color, uniform light to dark brown ; wings, gray-brown. 



Described from numerous females. 



Food plants: Certain Compositae, Rhammts crocea, Monardclla lancco- 

 lata, Sambucus glaitca, and other flowers. 



Locality: Claremont, Calif. (Crawford.) 



Phyllothrips fasciculata n. sp. 



Average length 1.55 mm.; general color very dark brown to l)lack. 



Head (Fig. 48 A) a little more than one and one-half times as long as wide, 

 widest posteriorly, narrowed anteriorly ; frons projecting over insertion of basal 

 segments of antennae, with anterior ocellus on vertex ; back of head slightly 

 reticulate and conspicuously serrated, and set with small spines raised on in- 

 conspicuous tubercles ; post-ocular spines long, and blunt at tip. Eyes medium, 

 finely facetted, slightly pilose, light brown. Ocelli present, anterior ocellus on 

 ape.x of produced part of vertex above insertion of antennae, and directed 

 forward ; posterior ocelli nearly contiguous with inner concave margin of eyes. 

 Mouth cone short and broadly rounded, reaching scarcely half the length of 

 prothorax; maxillary palpi long and slenger. Antennae (Fig. 48 D) eight- 

 segmented, only a little longer than head ; two basal segments almost black, 

 three light yellow, the remaining segments brown ; sense area on two and seven ; 

 two sense cones on distal end of three to six, inclusive ; antennae sparsely 

 clothed with small spines. 



Prothorax (Fig. 48 A) more than twice as wide as long, very much wider 

 posteriorly than anteriorly ; with one spine on anterior angles, one on posterior, 

 and one midlateral about equal in length to the one on anterior angle; a few 

 spines on posterior margin. Pterothorax with sides almost parallel, converging 



