46 THE CANADIAN ENTOMOLOGIST. 



one or two individuals. The antennae of all species which I have studied 

 vary greatly both as to the absolute and relative length of the segments. 

 One should measure quite a number, and then select that formula as 

 typical which occurs oftenest. I have on several occasions come very 

 near making serious mistakes by neglecting this : and as a further illus- 

 tration I might add that Prof. Cockerell's types of both Ripei'sia 

 Blanchardii and R. flaveola are specimens with malformed antennae. 



Among the specimens of " /?. Kingii" from Mass. two forms may 

 be roughly distinguished : one having joint i of the antenna, about 

 4C-50 /A long; and joint S, 75-80 // long; the femur, 140-1 70 /x long 

 and about So // broad. The second form has jt. i, 50-65 /a long ; jt. 8, 

 90-1 10 j). long, and the femur 200 jt. or more long, and about 8c // wide. 



One would be inclined from their general appearance under the 

 microscope to divide them at least into a species and variety : but some 

 specimens show intermediate characters. The specimens of Z). sorg/iiellus 

 from Mr. Forbes belong to the group of the smaller individuals, while 

 Cockerell's type of D. Kingii inclines toward the larger. It may be 

 possible at some future time to separate the latter at least as a variety, but 

 I do not feel justified in doing so at present. 



Eriococcus Gilleitei, n. sp. — Adult 9  Ovisac pure white, elongate 

 ellipsoidal, 2-3 mm. long. The ovisacs may be crowded together, but 

 each retains its form ; /. t'., they do not become a confused mass of cotton. 



Dead, shriveled, females brownish and scarcely 1 mm. long, mounted 

 they are about 2 mm. long, ^^^^en cleaned and mounted the dermis is 

 colourless and bears numerous glands and conical spines ; the spines, 

 however, are not so large or numerous as in E. adefiostomce, Ehrh., the 

 largest being 15/Along; the glands also seem to predominate over the 

 conical spines, while in E. adefiostomce the spines are most numerous ; 

 there are also a few large hairs scattered over the dermis. Antennas 

 7-jointed, the joints quite variable in both actual and relative lengths, 

 each bearing the usual hairs ; joint i can seldom be measured ; joint 2, 

 28-31 fi long; joint 3, 45-60 /a long; joint 4, 25-40 /z long; joint 5, 15- 

 25 /-I long; joint 6, 20-25 /^ long; joint 7, 25-45 /x long. It is almost 

 impossible to give an average formula, but joint 3 is always longest. Legs 

 rather long and slender ; femur about 150 /x long by 50 /x wide ; tibia loc- 

 iio/x long by 30 /x wide ; tarsus 1 15-135 /x long by 20 /x wide. Digitules 

 of tarsus quite long and knobbed ; digitules of claw also quite long and 

 knobbed. Segments of leg with the usual hairs. Anal ring with eight 



