4 2 



prominent, fused on their inner edges ; with a distinct notch on the 

 outer edge of each lobe. Second lobe obscurely divided into an 

 inner and outer lobule. Inner lobule a little oblique, with one or 

 two notches on the outer edges ; outer lobule small, entire or with 

 one notch. Third lobe, when present, faintly divided into two lob- 

 ules ; inner lobule with one faint notch or entire. The gland-spines 

 are arranged as follows: i, 1-2, 2, 2-4, 5-7. Those in the second 

 and third groups are often forked at the tip. The first one is short, 

 blunt or sometimes wanting. Second row of dorsal gland-orifices 

 entirely absent. Third row with 4 6 orifices in the anterior and 

 4 5 in the posterior group. Median group o^ drcumgenital gland- 

 orifices, 20 30; anterior laterals, 18 42 ; posterior laterals, 20 30. 



SCALE OF MALE. Plate 2, Fig. 6 A. Length, .7 i mm. Sides 

 parallel ; tri-carinate. Exuvia pale yellow, occupying about two- 

 fifths of the length of the scale. 



MALE. Two forms of males occur in this species ; one with fully 

 developed and one with rudimentary wings. Both forms agree as 

 follows: Length of body .25 to .35 mm. Reddish brown; eyes 

 prominent ; antennae yellowish or sometimes pinkish, ten-jointed, 

 covered with stout transparent hairs. Legs stout, lighter in color 

 than the body ; tarsi sparsely hairy. Style about .2 mm. long, of 

 about the same color as the legs. 



In the form with fully developed wings, these organs extend, when 

 folded over the back, a little beyond the tip of the style and the 

 halteres are well developed. In the other form the wings are repre- 

 sented by mere stubs and the halteres are short and stout and lack 

 the terminal hook. I have never seen the male insect and have 

 arranged the foregoing description from that published by Johnson. 



REMARKS. 



The nearest relative of C. americana is C. caryae. The two 

 species may be distinguished by the fact that in C. americana the 

 median lobes are notched, while in C. caryae they are entire. This 

 species is a native of North America and so far as known has been 

 taken in no other country. Professor Johnson described it from 

 specimens from Illinois and stated that it is found throughout that 

 state and in Minnesota. The Department of Agriculture contains 

 examples from Stillwater, Okla.; Belton, Tex.; Oswego and Edger- 



