SUBFAMILY APHINAE 197 
Ovipara. Apterous. Rusty brown; cornicle and appendages pale to colorless, except 
tarsi and tips of antenna and of tibiae black, hind tibia on almost entire length, black. Body 
length 1.10-1.70; antenna .60-.90; with hind tibia distinctly swollen and bearing numerous 
small sensoria along almost entire length. 
Male. Alate. Dusky yellowish brown with blackish dorsal bands and lateral areas on 
abdomen; antenna blackish; legs, cornicle and cauda brownish to dusky except tarsi and tips 
on tibiae which are black. Measurements as in alate vivipara. Sensoria present and numerous 
on III, IV and V. 
O yi 
Soa Apt. Viv. 
yyy aATge oTm 
a sab 4B 
Small eee: 
t Co, La efor 
11,30 ~.38 ) 
Fig. 227. Cavariella ps | 
Small Form. Apparently differing only in smaller size, taken in several collections in 
Utah. Measurements as follows: Apterous Summer Vivipara. Body length 1.25-1.5; hind 
tibia .50-.68; hind tarsal II .10-.11; antenna .55-.63; rostral IV+V .10-.11, attaining 2d coxa; 
cauda .08-.10 on median line; dorsal tubercle on abdominal VIII .12. Alate Vivipara. Body 
length 1; antenna .65. Otherwise as in apterous vivipara except dorsal tubercle on abdominal 
VIII shorter and as figured. 
Collections. On winter host, on leaves and twigs of willow (Salix sp.); on 
summer hosts, leaves of Ligusticum porteri and the following Umbelliferae: Dill 
(Anethum graveolens), celery (Apium graveolens), Berula erecta, caraway 
(Carum petroselinum), water hemlock (Cicuta douglasi), carrot (Daucus car- 
ota), cowparsnip (Heracleum lanatum) and parsnip (Pastinaca sativa). Through- 
out region. Fundatrices March 16 to 19 on Salix sp., apterous summer viviparae 
March 9 to Dec. 6 and alate viviparae June 10 to Dec. 6 on Umbelliferae, sex- 
uales Oct. 19 to Nov. 1 on Salix sp.; rather common. 
Chief Distinguishing Character. Short unguis (not markedly longer than 
base of VI) and length of IV and V about same as base of VI and unguis 
respectively. 
Determination of this species was aided by study of specimens determined 
by Hille Ris Lambers. 
Cavariella essigi (Gillette and Bragg) 
Hyadaphis pastinacae (Linnaeus), (misidentification), Essig, 1911c¢:534. 
Siphocoryne essigi Gillette and Bragg, 1918a:94. 
Cavariella essigi Gillette (erroneous, for Gillette and Bragg) Gillette and Palmer, 
1932b:467. 
Apterous Summer Vivipara. Light green; appendages pale. Body length 2-2.2; hind tibia 
1.2; antenna 1.07; rostrum attaining 2d coxa. Dorsal integument shagreened. 
Apt. Viv 
Co. 
<— Tb) A0-.50 
$52 60 Roe 26 48 
e Vi 
AN 7 | Be = 1" 
Fig. 228. Cavariella essigi 
Alate Vivipara. Head and thorax black; abdomen pale yellowish green to bluish green; 
with dusky dorsal dashes and lateral areas on abdomen; all appendages, cauda and cornicle 
pale to slightly dusky. Body length 1.9-2.1; hind tibia 1.3-1.4; antenna 1.4-1.6, secondary 
sensoria irregular in size, strongly tuberculate. Hair slightly capitate; on hind tibia .02-.03. 
Cornicle slightly clavate, with flange and transversely wrinkled proximally. Cauda tapering 
and bearing 3-4 hairs on each side. 
