THE BLACKHEAD EIREWORM OE CRANBERRY. 43 
coxae exposed ; antennae and mesothoracic legs not reaching to end of wings ; 
several strong setae on tenth abdominal segment ; a pair of stout setae on each 
side of anal rise ; anal rise unarmed ; body seta? otherwise weak and hardly 
distinguishable ; spiracles slightly reduced ; anal and genital openings slitlike 
in both sexes ; cremaster absent. 
Larva. 
Plate II, D; Plate III, A-C, E-G. 
Cylindrical, slender, very slightly tapering at caudal end. No secondary hair. 
Legs and prolegs normal. Crochets uniordinal, in a complete circle. Anal 
fork present, reduced. Prothoracic shield broad, divided. Spiracles round, 
moderate ; that on eighth abdominal segment slightly higher than those on 
abdominal segments 1 to 7, not over one and one-half times as large, same size 
as that on prothorax. Skin evenly and appreciably scobinate. 
Body seta? moderately long ; tubercles broadly chit'nized ; IV and V on 
abdominal segments 1 to 8 under the spiracle and approximate; prespiracular 
shield of prothorax elongate, large, bearing three seta? (Ill, IV, and V) in a 
longitudinal line ; group VI bisetose on prothorax, unisetose on mesothorax 
and metathorax, greatly reduced and closely approximate to IV and V on 
abdominal segment 9; III antero-ventrad of the spiracle on eighth abdominal 
segment, directly over the spiracle on abdominal segments 1 to 7 ; Ilia not distin- 
guishable ; on thoracic segments 6 setae in group VII ; VII bisetose on abdominal 
segments 7, 8, and 9 ; ninth abdominal segment with 9 setae in a nearly vertical 
line, paired seta? of group II close together on same ehitinization on dorsum, 
I and III closely approximate ; on abdominal segments 1 to 8 II latero-caudad 
of I ; prothorax with II a slightly higher than P, closer to II b than to P, II b 
above the level of puncture z ; I b nearer to puncture z than to 1°, 11° about equi- 
distant from I b and P, puncture y directly caudad of P, puncture x dorso- 
caudad of I a and on the level of II a . 
Head capsule spherical, nearly square in outline viewed from above ; slightly 
wider than long; greatest width well back of middle of head; incision of 
dorsal hind margin slight, about one-fourth the width of the head; distance 
between dorsal extremities of hind margin about half the width of the head. 
Frons broad, triangular, longer than wide, reaching beyond middle of the head. 
Adfrontal sutures extending to incision of dorsal hind margin. Longitudinal 
ridge very short, less than one-third the length of the frons. 
Ocelli six ; lenses well defined. 
Epistoma normal. 
Frontal punctures close together ; well forward of frontal setae ; distance 
from frontal seta (F 1 ) to first adfrontal seta (Adf 1 ) about equal to distance 
separating adfrontal seta? (Adf 1 and Adf 2 ) ; Adf 2 anterior to beginning of longi- 
tudinal ridge ; puncture Adf a between and about equidistant from Adf 1 and 
Adf 2 . 
Epicranium with the normal primary seta? and punctures and with a row 
of three ultraposterior setae and one puncture. Anterior seta? (A 1 , A 2 , and A s ) 
in a line with lateral seta? (L 1 ) ; anterior puncture (A a ) closely approximate 
to and posterodorsad of A 2 . Posterior seta? (P 1 and P 2 ) and puncture (P b ) 
in a line with first adfrontal seta (Adf) ; P 1 about middle of head, on the 
level of adfrontal puncture and lateral seta (L 1 ) ; P b between and about equi- 
distant from P 1 and P 2 ; puncture P a lying between P 1 and L\ approximate to 
the latter. Lateral puncture directly posterior to L 1 , remote. Ocellar seta? 
(0\ O 2 , O 3 ) well separated, forming a right angle; O 1 lying below and between 
ocelli II and III ; O 2 postero-ventrad of ocellus I, in a line with ocelli 1 and II 
