THE THYSANOPTERA OF CALIFORNIA. 45 



9. Genus AcantJio/Jirips Renter. 



Represented by a single species (24) .1. doaneii, new species. 



10. Genus Megalothrips Uzel. 



Represented by a single species (25) M. ]iesj>ern!<, new species. 



11. Genus Cryptothrips Uzel. 



Represented by a single species (26) C. culifuruicus Daniel. 



Family JEOLOTHRIPID^.' 



The antennaj are nine-segmented. Ocelli are present in both sexes. 

 The maxillary palpi are three to seven segmented; labial palpi are four 

 or tivc segmented (sometimes two segmented in European forms). 

 The wings are large, l)road, and roimded at the outer ends. Each fore 

 wing has a heavy ring vein and two longitudinal veins extending from 

 base to near tip; each fore wing has f i"om three to five cross-veins; the 

 fore w ings are without a fringe on the front margin. Both sexes bear 

 a peculiar thumb and fore-finger-like hook on the outer side of the 

 second segment of each fore tarsus. The ovipositor of the female is 

 upturned. Males have the first abdominal segment nmch longer than 

 the second. The members of this family have very long legs. 



1. Genus OROTHRIPS, new genus. 



Head wider than long. Ocelli present in both sexes. Antenna 

 nine-segmented, all sutures freely movable; third and fourth about 

 equal in length. Maxillary palpi geniculate, seven-segmented; labial 

 palpi five-segmented. Prothorax about one-third wider than long, its 

 hind margin bordered with several quite strong spines on either side. 

 Legs long and slender; fore femora thickened in both sexes; all tibia 

 armed. Second fore tarsal segment in both sexes with hook-like 

 appendage. Wings present in both sexes, broader in distal third, 

 narrower near base. Anterior part of ring vein and two longitudinal 

 veins thickly set with stout spines. Fore wing with two broad, 

 darkened cross-bands near center and tip respectively, also darkened 

 area near base. 

 (1) Orothrips kelloggii, new species. (PI. I, figs. 1— i.) 



2Ieasurements: Head, length 0.16 mm., width 0.22 mm.; prothorax, 

 length 0.16 mm., width 0.28 mm.; mesothorax, width 0.13 mm.; 

 abdomen, width 0.41 to 0.50 mm.; total body, length 1.80 mm. 

 Antenna?: 1, 36yu; 2, 54yM; 3, 114//; 4, 108/^; 5, 60/<; 6, 4.5yM; T, 42//; 

 8, 24/<; 9, 33//; total, 0.51 mm. General color dark brown, sometimes 

 light brown, prothorax and abdomen shaded with orange. 



Head about one-fifth wider than long and about as long as and 

 retracted into prothorax; cheeks strongly arched; back of head trans- 

 versel}^ striated and clothed with small spines, a single pair posterior 

 to ocelli, largest. Eyes large, black, with light posterior margin, 



" It has been necessarj^ to extend the characters of the family ^Eolothripiche as 

 given by both Uzel and Hinds in order to include California forma. 



