102 INSECUTOR INSCITI^ MENSTRUUS 



ment 7; sense cone formula: 3, 0-1; 4, 1-2+'; 5, 1-1+'; 6, 

 1-1+' ; 7 with one on dorsum near apex. Mouth cone long, 

 acute, attaining base of prosternum. 



Prothorax along median dorsal line about three-fourths as 

 long as head and (inclusive of coxse) about 2.3 times as wide 

 as long ; all bristles present, capitate, the two pairs at the 

 posterior angles longest and subequal ; coxal bristle about 

 equal in length to midlateral. Pterothorax wider than pro- 

 thorax, sides slightly arcuate. Wings long, closely fringed, 

 of nearly the same width throughout ; fore pair with the three 

 subbasal bristles capitate and with about 25 accessory hairs 

 on posterior margin. Fore tarsi unarmed. 



Abdomen of normal form, large and heavy, wider than 

 pterothorax. Tube about 0.9 as long as head and slightly 

 more than twice as wide at base as at apex. Lateral abdominal 

 bristles capitate, yellowish ; terminal bristles pointed, brown, 

 slightly shorter than tube. 



Measurements of paratype (female): Length 1.90 mm.; 

 head, length 0.208 mm., greatest width 0.215 mm., width at 

 base 0.187 mm. ; eyes, length 0.079 mm., width 0.067 mm., 

 interval 0.078 mm. ; postocular bristles, length 0.062 mm. ; 

 prothorax, length 0.161 mm., width (inclusive of coxge) 0.372 

 mm. ; pterothorax, length 0.408 mm., width 0.408 mm. ; abdo- 

 men, greatest width 0.461 mm.; tube, length 0.186 mm., width 

 at base 0.088 mm., at apex 0.042 mm. 

 Antennal segments : 12 3 



Length (^) 48 56 59 



Width (^i) 38 35 34 



Total length of antenna, 0.461 mm. 



Male (macropterous). — Length about 1.8 mm. Color and 

 structure essentially as in female, except that the antennae are 

 twice as long as head. The fore tarsi are unarmed. 



Measurements of paratype (male) : Length 1.84 mm.; head, 

 length 0.222 mm., greatest width 0.211 mm., width at base 

 0.174 mm. ; eyes, length 0.086 mm., width 0.066 mm., interval 

 0.072 mm. ; postocular bristles, length 0.068 mm. ; prothorax, 



