GENERIC CLASSIFICATION OF APHIDIDAE. 53 



diverging, fleshy spines, with a sharp, quite Jong 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 antennae, 

 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 pahs 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 CERV APHIS Van der Goot. 



Plate VIII, G. 

 1916.. Cervaphis Van der Goot, Zur Kenntniss der Blattlause 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 schoutcdeniae V. d. Goot. 



Subtribe MACROSIPHINA. 



The genera of the subtribe Macrosiphma may be separated at once 

 from those of the Aphidina in that they have developed large antennal 

 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 6. 



1 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. Antennae of five segments. Cauda somewhat knobbed, anal plate large and projecting. 



Type (monotypical),Afcfcaj'a polygine, Takahashi. 



