GENERIC CLASSIFICATION OF APHIDIDAE. 53 
diverging, fleshy spines, with a sharp, quite long and slender spine at the tip; the 
posterior pair longest; all of them black; the end of the body is fringed with fine and 
quite long hairs. Legs as in other Aphides. 
The apterous females are dark brownish or grayish green above, with a somewhat fusi- 
form median, yellowish strip, broadest near the head, tapering posteriorly to a point 
and terminating in front of nectaries; the sutures of the segments, the sides and under 
side of the body are also of a yellowish color, on account of which, there is each side a 
subdorsal row of transverse, dark spots. The head and about basal half of the antennas, 
dark, dirty yellowish, the eyes dark brown. There are about 4 short and curved 
capitate hairs on the front of the head and prominent fleshy tubercles each side of the 
body, each bearing at its apex a short, capitate spine or hair, all of them growing longer 
. toward the nectaries, while beyond the nectaries there are two pairs of long and slender 
fleshy tubercles, tipped with a spine, ?s in the migrant. A tail could not be seen. In 
the younger forms and pupae, the tubercles are as in the apterous female. In the 
pupae the head, prothorax, abdomen and nectaries are of a dirty yellowish color, with 
transverse rows of small, black or dusky spots on the abdomen. The wing pads are 
black. 
Genus CERVAPHIS Van der Goot. 
Plate VIII, G. 
1916. CcrvapMs Van der Goot, Zur Kenntniss der Blattliiuse Java's, p. 148. 
Characters. — Body armed with a series of long toothed projections; antennae of 
apterous form five-segmented, of the alate form six-segmented with somewhat oval 
sensoria. Fore wings with the media once branched; hind wings greatly reduced in 
size and lacking both the media and cubitus; cornicles elongate, subcylindric. 
Cauda and anal plate reduced. Oviparous females often winged. 
Type (fixed by Van der Goot, 1916), Cervaphis sclioutedcniae V. d. Goot. 
Subtribe MACROSIPHINA. 
The genera of the subtribe Macrosiphina may be separated at once 
from those of the Aphidina in that they have developed large antenna! 
tubercles. These may assume various shapes by which the genera 
often may be separated. Considerable variation is met with also in 
the cornicles and cauda, although as a rule the cornicles are very well 
developed. They may be either cylindrical or swollen. In one 
genus, Hyalopteroides Theo., the cornicles are very short, suggesting 
some of the genera of the Aphidina. The cauda is as a rule rather 
long. The wings are in nearly every case normal in venation. The 
different genera may be separated by the following key: 
Key to the Genera of the Macrosiphina. 1 
1. Cornicles swollen 2. 
Cornicles cylindrical or tapering, scarcely swollen G. 
i Since this paper was set up Takahashi (Insect World, v. 23, p. 439) has erected the following genus, 
which will fall in this subtribe. 
Genus AKKAIA Takahashi. 
Characters. — Cornicles swollen; frontal tubercles and first antennal segment with prominent projec- 
tions. Antennse of five segments. Cauda somewhat knobbed, anal plate large and proj ecting. 
Type (monotypical), Akkaia polygine, Takahashi-. 
