REVISION OF STREPSIPTERA PIERCE. 131 



nse slightly longer than the breadth of the head, very sensitive, 

 basally arising under a projecting flap, the first, second, and third 

 joints concave for reception of following joint, but first not concealing 

 second, basal joints lighter than rami, and not sensitive. Maxillae 

 bent at base thence cylindrical, pubescent, obliquely truncate at apex; 

 palpus arising from center of truncation, elliptical, pubescent, almost 

 one-half the length of the maxilla, and about one-half as thick in 

 diameter. Mandibles ensiform, strongly curved throughout, with tip 

 slightly recurved, surpassing the maxillse and palpus by the lengths 

 of the palpus. Mesostigmatal lobe present. (Edeagus reflexed, 

 broadly rounded at thickest point above, apex turned almost at a 

 right angle. 



The following measurements were taken by microscope and may 

 be considered in the same light as those preceding. A Bausch and 

 Lomb instrument, with two-thirds objective, 2-inch eye-piece, tube 

 length 160, is the standard used. The figures given below are in 

 spaces which measure 0.0157 mm. 



Antennae: Length = 60; fourth segment = 53; greatest breadth = 7. 



Head: Distance between outer bases of antennae = 22; between 

 inner front edges of eyes = 33 ; between inner hind edges of eyes = 45 ; 

 breadth of head = 57. 



Mouth parts: Mandibles = 22.5; maxilla = 11; distance to base of 

 palpus or second joint = 10; palpus =4. 



Prothorax: Length = 9; breadth = 22. 



Mesothorax: Length = 10; least breadth = 22; greatest breadth = 30. 



Balancer or elytron: Length =48.5. 



Metathorax: Length = 105.5; praescutum plus scutellum =50; post- 

 lumbium = 11.5; postscutellum = 44 ; greatest breadth = 43. 



Abdomen: Length tenth segment = 18; length oedeagus=20. 



Anterior leg: Trochanter = 20; femur = 29; tibia = 33; tarsus = 30. 



Median leg: Trochanter = 26; femur = 34; tibia = 30; tarsus =28. 



Posterior leg: Trochanter = 16; femur = 30 (remainder could not be 

 measured) . 



Female. — Length of cephalothorax 1.29 mm., breadth at spiracles 

 1.21 mm., breadth at base of head 0.96 mm., distance between mandi- 

 bles at base 0.22 mm. Cephalothorax light brown with a dark band 

 covering the basal two-thirds; slightly longer than broad; not 

 greatly constricted at base, margin slightly convex to apical trunca- 

 tion, apex slightly sinuate convex; spiracles dorsal, not reaching 

 lateral edges; mandibles large quadrate with a large outward curved 

 tooth near inner angle on apical side. 



Type.— Oat. No. 10115, U.S.N.M. 



Named in honor of W. D. Hunter, the writer's immediate superior, 

 who has greatly encouraged and aided the present work. 



