132 APHIDS OF THE ROCKY MOUNTAIN REGION 
Aphis coweni Palmer 
Aphis veratri Cowen (in Gillette and Baker), 1895:122 veratri (preoccupied); Palmer, 
1936b:739 veratri Cowen. 
Aphis coweni Palmer, 1938:352 (new name for veratri Cowen). 
Apterous Summer Vivipara. Lead-gray to greenish black; dorsum reticulated; ap- 
pendages pale except tips; tarsi, cauda, cornicle, anal and genital plates black, rostrum 
dusky. Body length 1.40-2; across eyes .39; antenna 1.20-1.40; hind tibia .80-.90; rostrum 
attaining nearly or quite to 3d coxa. Cornicle cylindrical or somewhat broadened at base, 
cauda bluntly tapering to spatulate, bearing 4-6 hairs on a side. Hairs pointed on side of | 
abdomen .05. 
Alate Vivipara. Head and thorax brownish black; abdomen greenish black; antenna, 
cornicle, cauda, anal plate, tarsi and tips of tibiae black; rostrum dusky; tibiae yellow-brown- 
ish. Body length 1.3-2.2; across eyes .38-.40; antenna about 1.30; hind tibia .70-1.20; rostrum 
attaining 2d coxa. Hairs pointed; on hind tibia .03 (diameter of tibia .03); on side of body 
05. 
( 2 0-. 27) cS 
Nara ee 
ees A | BR RAO RIN TUT 
=a a (27 — 35) 
anneal pe SArern rrr rari 
(/2-14) 621 rig 
(1S -.22) 
o 
fae o 
(.20-.30) 2 
(17-25) 
Fig. 143. Aphis coweni 
Collections. On leaves of skunk cabbage (Veratrum californicum). Colo- 
rado: Southwest corner of North Park, Cedaredge and probably Custer Co.* 
Apterous viviparae July 8, 22 and Aug. 20, alate viviparae July 22 and Aug. 20; 
probably not rare but region of host plant rarely visited by collectors. 
Neotype. (Selected by the writer) U.S.N.M. Paratypes, Colo. Agr. Exp. 
Sta. Collection. 
Chief Distinguishing Characters. Dark body with pale legs, bushy cauda 
(about 6 hairs on each side), presence of a few sensoria on IV of alate viviparz, 
short unguis (shorter than III), rather long tibial hairs (.04-.05, equalling 
diameter of tibia), and short hind tarsal II (not longer than base of VI and 
shorter than rostral IV+V). 
This species is very close to A. fabae but differs in length of unguis and 
hind tarsus. 
Aphis crataegifoliae Fitch 
The Long-beaked Clover Aphid or Hawthorn Aphid 
Aphis crataegifoliae Fitch, 1851:66; Baker, 1919c:185 (synonymy); Hottes and Frison, 
1931a:190; Palmer, 1936b: 735. 
Aphis brevis Patch, 1915c:431. 
Fig. 144. Aphis crataegifoliae 
Alate Vivipara. Head and thorax black; abdomen yellowish to pinkish green with black 
lateral areas and dorsal dashes on abdominal VI, VII and VIII but no dorsal patch; ap- 
pendages and cornicle brown to dusky; cauda pale; anal and genital plates dusky. Body 
length 1.7-2; across eyes .43; antenna 1.25-1.34; rostrum attaining between 2d and 3d coxae. 
Cornicle cylindrical, imbrications denticulate; cauda broad and tapering, bearing 3 hairs on 
each side. Hairs pointed, rather long and numerous. 
Male. Alate. Head and thorax black; abdomen with lateral areas and dorsal bands on 
V-VIII blackish. Body length 1.5; across eyes .37; cornicle .06-.07; antenna bearing numerous 
sensoria. Otherwise as in alate vivipara. 
*Cockerell, 1893 :365, No. 895. 
