40 APHIDS OF THE ROCKY MOUNTAIN REGION 
Ovipara. Apterous. Yellowish brown with a longitudinal pair of darker lines or rows of 
spots; pulverulent only on intersegmental lines, without pulverulence on tip of abdomen; 
appendages as in vivipara. Body 3 by 1.7; hind tibia 1.3. 
Male. Alate. Head and thorax brown; abdomen light apple-green with two longitudinal 
rows of darker green spots; pulverulence very slight, evident on lateral areas; appendages 
as in above forms except III, IV and V which bear numerous sensoria. 
Egg. Shining honey-yellow to yellow-brown when laid; becoming black in a few days; 
naked. Deposited lengthwise end to end on upperside of needles of tree. 
Collections. On Picea engelmanni on bark of twigs; in small colonies or 
scattered. Colorado: Laramie-Poudre Tunnel, foot of Long’s Peak, Pingree 
Park, Cameron Pass and Black Mesa. Apterous summer viviparae July 9 to 
Aug. 20, oviparae Sept. 9 to Oct. 21, alate males Sept. 3; apparently rare. 
Type. U.S.N.M., No. 41943. Paratypes, Colo. Agr. Exp. Sta. Collection. 
This species differs from C. glehna (Essig) mainly as follows: Presence of 
very little pulverulence (while the latter is heavily pulverulent), once-forked 
media of fore wing and length of rostral IV (shorter than .19-.24). From C. 
piceicola (Cholodkovsky)* it differs as follows: Pale hind tibia (not “one-half 
tibia dark’’), shorter rostral IV (.15, not .20) and shorter hind tarsal II (.30-.35, 
not .38-.49). 
Cinara flexilis (Gillette and Palmer) 
The Black Limber Pine Aphid 
Sen. O-> 
Lachnus flexilis Gillette and Palmer, 1924:30. 
Cinara flexilis, Gillette and Palmer, 1931:853. 
Apterous Summer Vivipara. Brownish black throughout (greenish on thorax in younger 
examples); dull or shining, without pulverulence; legs dusky orange, with knees, tarsi and 
two-thirds or more of hind tibia and distal one-third or more of 1st and 2d tibiae black. Wings 
slightly smoky, stigma and costal margin dark. Body 4-5 by 2; antenna 2; hind tibia 3.25; hind 
tarsal II .45. Hairs on body .01-.03, rather sparse; on hind tibia not longer than third of diam- 
eter of tibia, medium in texture, very drooping, sometimes curved inward or lying nearly flat, 
very numerous; on antenna similar but less numerous. Rostrum attaining middle of abdo- 
men. Tibiae and tarsi rather heavy. 
Alate Vivipara. Same in color and measurements as aptera. Secondary sensoria irregu- 
lar and flat. Fore wing with media twice-forked. Very active and quick to escape. 
Ovipara. Apterous. Same in color and measurements as apterous vivipara. Without 
powdery secretion on tip of abdomen; shape of body slightly elongate, hind tibia not notice- 
ably swollen, bearing very small and inconspicuous sensoria along almost entire length. 
Egg. Black, naked. Size 1.00 by .35. 
Collections. On Pinus flexilis, on bark of twigs and small branches; rather 
scattered, not in colonies. Colorado: near Estes Park. Apterous viviparae July 
22 to Aug. 18, alate viviparae July 22, oviparae Sept. 18 and 21; apparently rare. 
Type. U.S.N.M., No. 41963. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Metatypes, Hille Ris Lambers Collection. 
*According to original description and metatype specimens. 
