INSECUTOR INSCITI^ MENSTRUUS 73 



Tube l.G times as long as head and nine times as long as width 

 at base, which is 1.8 times the width at apex. 



Measurements of allotype (male) : Length 3.53 mm.; head, 

 length 0.384 mm., width across eyes 0.210 mm., width behind 

 eyes 0.197 mm., width near base 0.210 mm., width at extreme 

 base 0.]92 mm.; eyes, length 0.126 mm., width 0.074 mm., 

 interval 0.060 mm.; prothorax, length 0.180 mm., width (in- 

 clusive of coxse) 0.330 mm.; pterothorax, length 0.348 mm., 

 width 0.40S mm. ; abdomen, greatest width 0.336 mm., length 

 of segment S, 0.288 mm., length of segment 9, 0.192 mm., tube, 

 length 0.607 mm., width at base 0.076 mm., at apex 0.042 mm. 

 Antennal segments ; 123 4 5 678 



Length (|.i) 57 51 150 124 121 114 69 54 



Width (^i) 40 40 29 36 34 33 24 15 



Total length of antenna, 0.740 mm. 



Described from four individuals of each sex taken by Prof. 

 C. F. Baker at Los Banos, Philippine Islands. The specimens 

 were transmitted for determination by Prof. D. L. Crawford, 

 after whom the species is named in recognition of his work on 

 the Thysanoptera of California and Mexico. 



CERCOTHRIPS, new genus 



Head elongate, more than twice as long as wide, not pro- 

 longed in front of eyes, lateral bristles not prominent; vertex 

 not at all produced in front of eyes, without the usual pair of 

 prominent bristles near anterior ocellus ; postocular bristles 

 short and sublateral in position ; antennae long and very slen- 

 der. Wings broad, the fore pair with subbasal bristles 

 minute ; hind pair with distinct median vein extending almost 

 to tip. Legs slender, fore tarsi weakly armed in male, un- 

 armed in female. Abdomen long, slender, and flattened; pos- 

 terior angles of intermediate segments prolonged in both sexes 

 (conspicuously in the male, slightly in the female) and tipped 

 with a stout spine. 



Type: Acanthinothrips nigrodentatiis Karny. 



The characters given above separate this genus readily from 

 all others in the family. Instead of being allied to Acanthi- 



