NOV., '04] ENTOMOLOGICAL NEWS. 293 



New California Thysanoptera. 



BY S. M. DANIEL. 



Four species of Thysanoptera have been recorded from Cali- 

 fornia : Euthrips occidcntalis, Euthrips tritici, Tlirips tabaci 

 and Heliothrips fasciatns. To this list I am able to add Helio- 

 thrips hccnwrrhoidalis and the four new species Criptothrips 

 californicus, Eiitlirips pyri, Sericotkrips apteris and Caliothrips 

 woodivorthi. 



Our species may be distinguished by the following synopsis: 



Female without ovipostor (Phlceothripidpe) Criptothrips 



Criptothrips californicus nov. sp. 



Female. Length 1.7 mm. ; width 0.3 mm. ; general color black, dark 

 brown under the microscope. 



Head cylindrical, 0.3 mm. long, 0.15 mm. wide, about as wide as pro- 

 thorax is long. Cheeks almost straight and nearly parallel, set with a 

 few minute spines ; surface of head finely cross-striated. Eyes quite 

 large, occupying about three-fifths the width of the head, quite finely 

 faceted and protruding very slightly ; ocelli situated far forward, poste- 

 rior ocelli close to margin of eyes, front one on apex of prolonged vertex 

 of head, color same as that of second antennal segment. Antenme 

 inserted below vertex, approximate at base, about one and one-half times 

 as long as head, eight-segmented ; length of segments : 31, 53, 79, 68, 58, 

 31. 45, 31. First segment concolorous with head, second base concolor- 

 ous with first, apex light brown, third and base of fourth and fifth pale 

 yellow, the rest of the antennae shading to dark brown. Spines and sense 

 cones quite prominent. 



Prothorax comparatively small, about one-half length of head. One 

 prominent spine at each posterior angle, anterior marginal and mid-lat- 

 eral spines wanting. Surface finely cross-striated. Pterothorax approxi- 

 mately as wide as abdomen, nearly cylindrical, narrowing abruptly in front, 

 gradually behind. Wings extending to about the seventh segment, 

 fringe long and wavy. Legs long and slender ; fore coxa projecting 

 strongly, fore femora scarcely thickened. Femur, tibia and tarsus bare, 

 with the exception of a number of small spines, more numerous and 

 longer on fore tibia than on the others. Legs concolorous with body. 



Abdomen long and slender, cylindrical to about the seventh segment, 

 a little more than twice as wide as head ; from this segment tapers grad- 

 ually to tube. Tube a little more than half the length of head, sides 

 straight, converging slightly, width at middle about one-fourth that of 

 head ; four terminal hairs approximately as long as tube, six shorter ones. 

 Spines at sides of abdomen slender, pale, prominent, two on sides of each 

 segment. Segments overlapping considerably ; sides of abdomen black, 

 shading to russt .t-brmvn at tvnter. 



