I70 AGRICULTURAL EXPERIMENT STATION. 



Description of the Adult. 



This species averages 4 to 5 mm., ^.16 to .20 of an inch in 

 length, with the beak about half as long as the body. The head 

 is dark brown with scattered yellowish scales at the angle of the 

 eyes and a tuft of yellowish hair from between the eyes projects 

 forward over the head. A narrow line of similarly colored 

 scales forms a border to the posterior margin of the eyes. The 

 proboscis is evenly dark brown. The palpi in the female (fig. 

 48) are the same in shape as the other species of Anopheles, but 

 are dark brown in color, almost black, with the apical joint, base 

 of the penultimate and of the antepenultimate joints white. The 

 male palpi are dark brown with the long hairs toward the apex 

 yellowish. The antennas are dark brown in the female, paler in 

 the male. 



Figure 48. 



Wing and palpus of female A. crucians: enlarged. (Original.) 



The dorsum of the thorax is brown, mottled at the sides with 

 grayish scales, and with narrow stripes of scales of the same color 

 down the central part; the pleura and legs are the same as in 

 punctipennis, but the latter are not nearly as dark. The wings 

 are hyaline, with black, whitish and gray scales as follows : costa, 

 black ; subcosta, black ; radius i , black ; a few white scales at ex- 

 treme apex and some grayish ones just before the cross vein be- 

 tween radius i and radius 2 ; radius 2, black, broken twice with 

 white portions before the fork and white again at the margin; 

 radius 3, a large portion at base black, a smaller portion black at 

 the margin, the intermediate part white; radius 4 and 5, black at 

 the base and again at the margin, grayish and whitish scales be- 

 tween ; media i and 2, grayish to the fork, with a small black 

 patch at the cross vein, after the fork black at both ends, white 

 iDetween; media 3, black at both ends, white between; cubitus i, 

 white to the fork, then black to a little beyond the cross vein and 

 again at the wing margin, the intermediate part white; cubitus 

 2, white, except a small black portion at margin ; anal vein, white, 

 a small black portion at each end and one in the center. 



