22 



BULLETIN 100, U. S. DEPARTMENT OF AGRICULTURE. 



THE WINGED VIVIPAROUS FEMALE (FIG. 10). 



General color pale lemon-yellow; many examples are greenish yellow and others 

 decidedly pinkish. Head, thoracic lobes, and scutellum pale brown or yellowish 

 brown. Eyes pink. Antenna? on small frontal tubercles, about half as long as the 

 body, pale yellow, with articulations of joints III to VI black; joint III the longest, 

 not noticeably thickened basally; joint IV slightly longer than V and barely as long 

 as joint VI, together with its spur or filament. Bases of antenna? encircled, in the 

 majority of individuals, with a narrow dusky ring. Close to the lateral margins of 

 the prothorax and roughly parallel to them occur two narrow black lines. (These are 

 sometimes absent.) Wings of moderate size; costa, subcosta, and stigma pale yellow- 

 ish green, other veins light brown, of medium thickness. Stigmatic vein entirely 

 subobsolete, its course not easily made out. Legs very pale, whitish, tarsi and apex 



Fig. 10. — Monellia caryx: Winged viviparous female, a, Antenna. (Original.) 



of tibiae dusky grey; anterior and posterior femora in about half of the individuals 

 bear a grey knee spot quite like that of Chromaphis juglandicola Kalt. but smaller. 

 This spot never occurs on the middle femora. Abdomen pale yellow, sometimes 

 greenish and at other times reddish, with four rows of small black spots, which are 

 very variable and often wholly absent. The two lateral rows have larger spots and 

 these are found on segments 2-6; the two median rows are smaller and their spots 

 exist on segments 2-8. Cornicles on segment 6, hardly perceptible, more than twice 

 as broad as long, about O.00S mm. long. Cauda globular, shorter than the hind tarsus. 

 Cornicles and cauda concolorous with the abdomen. Anal plate bifid, armed with 

 spines. Beak pale, extreme tip brown and not quite extending to the second pair of 

 coxa?. Sensoria occur on the antenna? as follows: Joint III, 6-9 transversely oval on 

 basal half or two-thirds of joint; in an equally spaced row; joint V, 1 terminal ; joint VI, 

 4 terminal (1 large, 3 small). Measurements: Length of body, 2.16 mm.; width of 



