KEY TO THE SPECIES. 19 



c' . General color similar to that of T. ilex; all tarsi gray-brown to brown; anten- 

 nae brown, with base of segment 3 yellow. 



(84) Trichothri'ps ilex dumosa Moulton. 



&\ Color brown to light brown; tarsi light brown; antennae concolorous with 

 body, except segment 2 and base and top of 3, which are yellowish; 

 sides of head nearly parallel (85) Trichothrips tridentatus Shull. 



(30) Genus Acanthothrips Uzel. 



1, Postocular spines wanting; back of head with spine-bearing tubercles; antennae 



hardly twice as long as head; body without latero-dorsal white 

 stripes. 

 a. General color yellowish brown; antennae, legs, and segments 8 and 9 of abdo- 

 men banded with nearly transparent or yellowish white; tube bear- 

 ing a circlet of eight very long hairs. 



(87) Acanthothrips magnafemoralis Hinds. 

 a\ General color dark brown, without white bands and without long hairs at end 

 of tube. 

 b. A distinct white fleck, by reflected light, on dorsal anterior corners of all 

 abdominal segments except the two basal and the two apical. 



(88) Acanthothrips nodicomis Renter. 

 ¥. Without whitish markings (89) Acanthothrips doanei Moulton. 



2. Postocular spines long and pointed; back of head without spine-bearing tuber- 



cles; antennae about one and one-fourth times as long as head; body 

 with latero-dorsal white stripes extending from posterior margin of 

 eyes to base of eighth abdominal segment. 



(90) Acanthothrips albivittatus Hood. 



(31) Genus Cephalothrips Uzel. 



1. General color yellowish brown; antennae yellow, shaded with brown; all femora 



and middle and hind tibiae brown; all tarsi and fore tibiae (except 

 at base outside) pale yellow; body length 1.48 mm. (1.40 mm. to 

 1.56 mm.) (91) Cephalothrips yuccas Hinds. 



2. General color dark brown; antennae dark brown, except segment 3, which is yel- 



lowish brown at tip; all femora and bases of all tibiae brown; tips 

 of all tibiae and all tarsi yellow; body length 1.16 mm. (1.86 mm. in 

 winged forms when bodies are distended). 



(92) Cephalothrips errans new species. 



(34) Genus Cryptothrips Uzel. 



1. Color brown to blackish brown, with conspicuous purplish pigmentation; seg- 



ments 1 and 2 of antennae concolorous with head, 3 and base of 4 

 yellow, others shading to brown toward tip; postocular spines not 

 long and prominent (93) Cryptothrips calif ornicus Daniel. 



2. Color uniformly coal-black, except tarsi, which are blackish brown. 



a. Antennae uniformly black; body length about 2.22 mm.; two pairs of promi- 

 nent postocular spines (96) Cryptothrips carhonarius Hood. 



a\ General color of antennae black, segment 2 paler at apex, segment 3 with two 

 transverse brownish-yellow bands, one at base and the other in the 

 middle; body length about 2.7 mm.; Avithout prominent postocular 

 spines (97) Cryptothrips rectangularis Hood. 



