TRIBES OF APHIDIDAE 67 
and numerous like a Lachnus (Anoecia) ; marginal sensoria scattered 
or in a row close to the primary. Rostrum short or at most moder- 
ately long. Fore wings with a twice-branched media, or but one- 
branched in the Anoeciini. Cornicles pore-like. Wax glands small 
and scattered, or grouped in large lateral areas. Fundatrix with six 
segments to the antennae (four in some). 
Biological characters. The Phyllaphidina live more or less ex- 
posed on twigs or on leaves of woody plants; one species is known 
to form a pod-like gall by the folding of the leaf. The present group 
may be said to contain the anomalous forms of the Pemphiginae that 
show more of the Lachnina and Chaitophorina characters than 
is the case with the more typical Pemphiginae. The two tribes included 
are not very closely related, and the arrangement may be looked upon 
as a provisional one until the life histories of the included forms be- 
come better known. 
KEY TO THE TRIBES OF THH PHYLLAPHIDINA 
1. Media twice branched as in Aphidinae; provided with gland areas secreting 
flocculent fibers. . . . 13. Tribe PHYLLAPHIDINI 
—Media with one branch only; antennae with long hairs as in Lachnina and 
Chaitophorina. ... . .; 14. Tribe ANOECIINI 
(32) Tree PR YEEAP ELD INT 
Koch, 1857, Die Pflanzenl. Heft 8. Sub Phyllaphis (genus). 
Koch (1857) first recognized the genus Phyllaphis, the only rep- 
resentative of the tribe at present. 
Morphological characters. Front strongly convex. Antennae 
short ; secondary sensoria oval or transverse, the marginal close to the 
primary in a row; spur of the terminal segment very short. Rostrum 
short. Fore wings with a two-branched media as in the Aphidinae. 
Cornicles pore-like. Anal plate very large and rounded and with a 
pair of lateral papilla. The glandular areas scattered over the dorsum 
or collected in two lateral areas on the posterior end of the abdomen. 
Biological characters. Members of the present tribe are found 
on tender twigs and leaves of trees and woody plants, covered with an 
abundant flocculent matter. Very diverse forms have been described 
under the genus Phyllaphis, which further study may dispose of other- 
wise. 
14. Trine ANOECIINI 
Koch, 1854, Die Pflanzenl. Heft 1. Sub Schizoneuriden (tribe). 
Mordwilko, 1908, Acad. Imper. Vol. 13. Sub Schizoneurina (group). 
Tullgren, 1909, Ark. Zool. Vol. 5. Sub Anoeciina (tribe). 
