318 



THE CANADIAN ENTOMOLOGIST. 



(Fig. 20) in this species are quite variable both in regard to the relative 

 length and actual size of the segments. I have observed the following 



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 formula' : 3 4 2 7 6 5. While in many cases the tarsus is longer than 



432765 

 the tibia (Ckll., loc. cii.), yet they are often subequal. The full-grown 

 young females appear much more spiny than the old females. 



Some time since I received specimens on Malvastrum coccineum, 

 collected by Mr. E. Bethel, at Denver, Colo., 

 which I at the time thought to be a distinct 

 species, and from those specimens prepared the 

 accompanying figure. I now consider them to 

 be this species. 



Prof. Cockerell has, in Aug., 1898, collected 

 specimens on the leaves of Atriplex canescms, 

 growing on the campus of the A. and M. College 

 of N. M., which I also refer to this species. 



The Colorado specimens are fairly constant 

 P^ 4// ) « ^" their antennal formulae of 4 3 2 7 5 6. 



^^ The specimens on the leaves of Atriplex are 



3y/^ 347256 



"'" quite variable in their formula: ^.^.: ^3 4; 7 5 



Fr;. 20. ^ ' * 3 (4 7) 2 5 6 



3 4(7 2) 5 6 

 Their legs and antennae are stouter than in the type form, and they have 

 more hairs between the bases of the antennae and legs. 



Dactvlopius Kingii, Ckll., var. Neo-Mexicana^ n. van 



During the past summer I collected this insect on the roots of 

 Gutierrezia sarothrce in the Organ Mts., N. M., at an altitude of about 

 5,000 feet. They were, in all cases, attended by ants. 



Adult 9- Length, 2 mm.; width about i mm. Shape, ellipsoidal, 

 rather plump. Colour yellowish. Nearly naked ; no lateral or caudal 

 filaments ; dorsum sparsely mealy. The antennae are 8-jointed, and 

 with the formula of Kingii, 81235764, the fourth joint, while shortest, is 

 relatively longer than it usually is in Kingii. Hairs on the segments about 

 the same as in Kingii, perhaps a little smaller. The whole antenna 

 is a little smaller than is usual in Kingii. Legs are rather smaller than 

 in Kingii; femur 130 /x long; tibia, 140 \i long; tarsus, 75 /^ long; 



