1917 



Colorado Species of Lachnus 



141 



Alate Viviparous Female. — Slender and powdery in appearance; 

 length 2; antenna, 1.12; joints of antenna, III, .45; tV, .20; V, .18; 

 VI (with spur), .15; sensoria on joint III usually very faint or appearing 

 to be entirely absent, but as many as 3 weak sensoria found in some 

 examples; hind tibia 1.40; beak barely reaching third coxse. See 

 figures 21 and 21b. 



Apterous Oviparous Female. — Described from specimens taken upon 

 the leaves of Pinus scopulorum, Boulder, Colorado, October 23, 1909. 



The general color varies from a yellowish brown to a brownish black ; 

 the head and terminal joints of the abdomen and the small cornicles 

 black, or blackish; the ventral surface of the abdomen and also the last 

 two segments above, as well as below, covered with pulverulent secretion; 

 antenna dusky in proximal portion and becoming black towards the 

 distal ends ; eyes black ; legs black except the basal portion of the middle 

 tibiae, and in some specimens the anterior tibiae also; coxge black; beak 

 reaching the middle pair of coxae; cornicles quite small, hardly broader 

 than high; length of body, 2.71; length of antennae, 1.14; joints of 

 antennae: III, .46; IV, .20; V, .25; VI, .17. The joints are rather slender 

 and set with long slender hairs. Hind tibiae, 1.75 and considerably 

 swollen in the basal half, where there are numerous circular sensoria. 

 Genital plates black, permanent sensoria only upon joints 5 and 6 of the 

 antennae. See figures 25 to 28. 



Taken depositing eggs in longitudinal rows upon the pine needles. 

 The eggs are covered with the cottony secretion from the bodies of the 

 lice which is rubbed on by means of their hind feet. Figures 23 to 30. 



Winged Male. — Body almost black in color, but rather heavily 

 covered with pulverulent secretion, both above and below. The 

 antennae, legs, costal margin of wings, stigma, stigmatic vein and eyes 

 black. The first and second cross veins are also rather conspicuously 

 black. Second fork of cubital vein, at least in some wings, entirely 

 wanting. Length of body, 2; antenna, 1.57; wing, 3.43; hind tibiae, 1.60; 

 beak surpassing the hind coxae; joints of antennae: III, .60; IV, .29; V, .31; 

 VI, .2. Numerous tuberculate sensoria occur upon joints 3, 4 and 5; 

 upon III, about 28; IV, 14; V, 6; second fork of cubital vein absent on 

 all the wings of the five specimens examined. 



The tarsi are very long in this species, the hind tarsus being nearly 

 as long as joint 3 of the antenna. See figure 31. 



This species seems very close to L. pini-radiatae Davidson. 

 Collection data as follows: 



Fundatrix /Ft. Collins, Colo. 



Alate and ("Colo. Spr., 



apterous vivi-jFt. Collins, 



parous females [Livermore, 



Ouray, 



Oviparous 9 . . 



Male. 



Ft. Collins, 

 Boulder, 

 Ft. Collins, 



rOuray, 

 .iFt. Collins, 

 I Boulder, 

 Ft. Collins, 



April 7, '10, M..A. Palmer, Pinus scopulorum 



May 28, '08, L. C. Bragg, 



June 22, '99, L. C. Bragg, 



June 30, '15, C. P. Gillette, 



July 18, '16, M. A. Palmer, 



Sept. 27, '14, C. P. Gillette, 



Oct. 13, '10, L. C. Bragg, 



Oct. 23, '09, L. C. Bragg, 



Nov. 7, '09, M. A. Palmer, 



Nov. 25, '09, M. A. Palmer, 



Sept. 27, '14, C. P. Gillette, 



Oct. 13, '10, L. C. Bragg, 



Oct. 23, '10, L. C. Bragg, 



Nov. 7, '09, M. A. Palmer, 



