THE CANADIAN ENTOMOLOGIST. 





Mexico, July, 1S97, by Mr. A. Koebele, and sent to the New Mexico 

 Expt. Station by Mr. L. O. Howard. This is the first time that D. 

 virgatus, CklL, has been found in Mexico. 



Phenacoccus minimus, n. sp. — Adult J . Length 

 about I mm. Shape, somewhat globular. Colour, reddish- 

 pink. 



Body nearly naked, and shining. No lateral fila- 



73^ 



\\ 



59 



6? 



Fig. 19. 



ments ; a pair of short, stout, flattened, caudal filaments. 



Antennae (see Fig. 19) of 9 segments : segment 9 

 longest : segments 2 and 3 next longest, these may be 

 subequal, or three may be the shorter; segment i next, 

 and fairly stout; segment 6 about same length as i, 

 although it may be a little shorter ; segment 7 next ; 

 segments 4, 5 and 8 subequal, and shortest. 



Formula 9(23)167(458). Segments of antennie with 

 very long, fine hairs. While the fully-developed antennas 

 have 9 segments, and are well represented in the figure, 

 yet a large proportion of the individuals examined have 

 7 and 8 segments. Those with 8 segments are due to 

 the failure of segment 8 to divide. Those with 7 are due 

 to lack of division in 3 and S. The division in the 8th 

 segment (terminal segment) is never so distinct as that 

 between the other segments. 



Legs. — Femur, length 185/x, width 50//; with some long, slender 

 hairs. Tibia, length 185 /x, width 30 //, with rather slender hairs. 

 T'arsus, length 85 /'., proximal end nearly as wide as tibia, tapering 

 toward the distal end to join the slender claw ; hairs similar to those on 

 tibia : a pair of slender hair-like digitules, not knobbed. Claw, length 

 -25 /x, slender, with a small denticle on its inner face. A pair of slender, 

 knobbed digitules longer than the claw. 



Anal ring normal. Anal lobes well developed. 



Ovisac. — Apparently without definite shape, just a fluffy mass of 

 fairly coarse filaments, enclosing the pale yellow, almost white, eggs, and 

 partially enclosing the female. 



Male unknown. 



Habitat. — On silver spruce, Picea pungens, Engelm. The specimens 

 were near the end of the twig on one side, at the base of the needles, and 

 had apparently caused the death of the needles. 



