26 APHIDS OF THE ROCKY MOUNTAIN REGION 
Lachnus brevispinosus Gillette and Palmer, 1924:27. 
Cinara brevispinosa, Gillette and Palmer, 1931:848; Knowlton, 1930:154. 
Fundatrix. Similar to apterous summer vivipara. 
Apterous Summer Vivipara. Color same as Cinara medispinosa unless with less pulveru- 
lence. Body 3; antenna 1.50; hind tibia 2-2.70. Hairs blunt, stout and numerous; on hind tibia 
equalling nearly half of the length of diameter of the tibia. 
Alate Vivipara. Head and thorax black; abdomen light pinkish cinnamon; without pul- 
verulence; antenna except proximal portions of III and IV, cornicle, cauda and anal and 
genital plates and entire legs black. Fore wing slightly smoky; media faint and twice- 
branched. Body length 2.25-2.50; hind tibia 2; antenna 1.15; unguis short and heavy-conical; 
rostrum attaining middle of abdomen. Hairs heavy, spinelike and rather numerous; on antenna 
and hind tibia drooping, shorter than diameter of tibia; on body same length but of finer 
texture. 
Ovipara. About the same as apterous vivipara or darker in older examples. Hind tibia 
very slightly swollen on proximal half and bearing numerous rather tuberculate sensoria along 
almost entire length. 
Male. Alate. Same as alate vivipara except somewhat smaller and darker and III, IV, 
and V bearing numerous sensoria. 
Collections. On Pinus contorta var. murrayana, on bark of twigs and small 
branches; in colonies. Colorado: Rocky Mountain National Park, Chambers 
Lake (at head of Poudre River), Pingree Park and Bellvue foothills. Utah: 
Logan Canyon. Idaho: Boise. Fundatrices May 22 to June 13, apterous summer 
viviparae June 17 to Aug. 30, alate viviparae June 30 to July 17, sexuales Aug. 
8 to Oct. 2; rather common. 
Type. U.S.N.M., No. 41962. Paratypes, Colo. Agr. Exp. Sta. Collection. 
This species agrees very closely with C. medispinosa, differing only in the 
shorter and stouter tibial hairs (shorter than .07). Breeding tests with viviparae 
(Gillette and Palmer, 1924:29) indicate the hereditary character of the tibial 
hair length in these forms of the life cycle. No tests through the sexual cycle 
were made. From C. schwarzii it is separated as follows: Stouter tibial hairs, 
slightly shorter rostral IV (not longer than .20) and color of body (more yel- 
lowish brown and almost without pulverulence). These latter species are, 
however, separated with difficulty and biological host transfer investigations 
should be attempted. C. apini very closely resembles this species but differs 
in slightly finer tibial hairs which are slightly longer (.06-.07 in alata) and 
more pulverulence on body, especially on the tip of the abdomen of the ovipara. 
Cinara burrilli (Wilson) n. comb. 
Fig. 18. Cinara burrilli 
Lachniella burrilli Wilson, 1919b:42. 
Laehaus sate Knowlton, 1930:158 (misidentification for pulverulens Gillette and 
almer). 
Apterous Summer Vivipara. ‘‘Black with pruinose patches and black spots; cornicle and 
tips of tibiae black.’’ Body length 2.5-3; across eyes .60-.64; antenna .83-.90; hind tibia 1.25- 
1.50; rostrum attaining between abdominal III and V. Hairs fine; .05 long on vertex and 
body. 
Alate Vivipara. Same as apterous vivipara except head and thorax dark. 
Collections. On twigs of Juniperus scopulorum. Idaho: Twin Falls. Alate 
and apterous viviparae July 6; apparently rare. 
