14 BULLETIN 746, U. S. DEPARTMENT OF AGRICULTURE. 
III above the spiracle on abdominal segments 1 to 7, before the spiracle on 
abdominal segment S ; Ilia rudimentary or indistinguishable, before the spiracle 
on abdominal segments 1 to 7, ventro-cephalad of the spiracle on abdominal 
segment 8; group VII trisetose on abdominal segments 3 to 7, unisetose on 
abdominal segments 8 and 9 ; abdominal segment 9 bearing six prominent seta? 
in a nearly vertical line, I rudimentary or absent, when distinguishable it is 
latero-cephalad of II and equidistant from II and III ; on the other abdominal 
segments II is slightly shorter than, and latero-caudad of I ; setse and punc- 
tures on prothoracic shield as follows : la, b, c behind the frontal margin of the 
shield, distance separating I& and Ic equal to that between Ha and Ho, 
Ha dorso-caudad of la, puncture z slightly lower than the level of II&, punc- 
tures x and y dorso-caudad of la, distance between Ic and He slightly less than 
that between lb and Ic. 
Head capsule (PI. IV, figs. 2, 4) spherical, slightly trapezoidal or broadly 
oval (nearly square) in outline viewed from above, as wide or a trifle wider 
than long; greatest width back of middle of head; incision of dorsal hind 
margin slight; distance between dorsal extremities of hind margin less than 
one-half the width of the head. Frons (FR) a trifle longer than wide, not quite 
reaching to middle of head; adfrontal ridges (ADFR) parallel from lower limit 
of epistomal area to point of juncture of tentorial arms, thence converging in 
slightly curved lines to the longitudinal ridge (LR) ; longitudinal ridge slightly 
longer than frons: adfrontal sutures (ADFS) meeting longitudinal ridge 
slightly behind middle of head. Projection of dorsal margin over ventral less 
than one-half the diameter of the head. 
Ocelli six (PI. IV, fig. 4) ; I larger and III smaller than the others; III and 
IV closer together than any of the others. 
Epistoma (PI. IV, figs. 2, 4) with the normal setse (E 1 , E 2 ). 
Frontal punctures (PI. IV, figs. 2, 4) (F a ) well separated; distance between 
punctures considerably greater than distance from puncture (F a ) to seta (F 1 ) ; 
distance from frontal seta (F 1 ) to seta Adf 1 about equal to distance separating 
adfrontal seta? (Adf 1 and Adf 2 ) ; Adf 2 well behind beginning of longitudinal 
ridge; puncture Adf a equidistant from Adf 1 and Adf 2 and approximate to 
beginning of longitudinal ridge. 
Epicranium (PI. IV, figs. 2, 4) with the normal number of primary setse and 
punctures and with three ultraposterior setae and one or two ultraposterior punc- 
tures. Anterior setae (A 1 , A 2 , A 3 ) in a right angle ; A 2 equidistant from A 1 and A 3 ; 
anterior puncture posterior to A 2 . Posterior setse (P\ P 2 ) and puncture (P b ) 
of posterior group lying parallel with longitudinal ridge; P 1 nearly on a level 
with beginning of longitudinal ridge ; P 2 on, or nearly on a level with place of 
juncture of adfrontal sutures with longitudinal ridge; P b between P 1 and P 2 ; 
P a slightly nearer to L 1 than to any other seta, lying between L 1 and P 1 . 
Lateral seta (L 1 ) remote from A 3 , on a level with P 1 ; lateral puncture (L a ) 
directly posterior to the seta, remote. Ocellar setae (0\ O 2 , O 3 ) well separated; 
O 1 equidistant from and ventrad of ocelli II and III ; O 2 directly ventrad of and 
approximate to ocellus I ; O 3 remote from and ventrad of O 2 , nearer to SO 3 than 
to O 2 ; puncture O a closely approximate to ocellus VI. Subocellar setse (SO 1 , 
SO 2 , SO 3 ) triangularly placed ; puncture SO a equidistant from setse SO 2 and SO 3 . 
Genal puncture (G a ) anterior to seta (G 1 ). 
Lalrum (PI. IV, fig. 5) with median incision moderately concave; setse 
M 1 , M 2 , and M 8 triangularly placed; M 1 and M 2 nearly on a line with La 1 ; 
La 1 and La 2 closely approximate; M 3 and La 3 on a line; distance separating 
M 3 and La 3 about equal to that between M 2 and M 3 ; -puncture equidistant from 
and slightly back of M 1 and M 2 . 
