GENERIC CLASSIFICATION OF APHIDIDAE, 19 
Characters. — Head slightly rounded; eyes large with distinct ocular tubercles. 
Antennse'of six segments armed with large sub circular sensoria and thickly covered 
with fine hairs. Cornicles situated on very broad, shallow, hairy cones. Cauda sub- 
conical, slightly rounded. Anal plate rounded. Fore wings with radial sector rather 
long and somewhat curved. Media twice branched; hind wings with both media and 
cubitus present, quite widely separated. Beak very long, much longer than body. 
Males wingless and with rudimentary mouth parts. 
Type (fixed by Walker, 1870), ApJiis quercus Linn. 
Subtribe TRAMINA. 
The subtribe Tramina is composed of insects quite specialized in 
nature, subterranean and often associated with ants. The typical 
genus Trama is the most specialized of all and is in some char- 
acters suggestive of the Fordina. Its relations with the other 
Lachnini, however, are shown clearly by the other genera. The 
genus Trama, as described by Del Guercio (Redia, v. 5) possesses 
small cornicles. Specimens of troglodytes, however, received from 
Schouteden, Mordwilko, and others lack cornicles entirely. Some 
other forms possess them either as very small cones or as large 
Lachmis-Iike structures. These latter are evidently the most primi- 
tive and to these is given the name Protrama. The insects with 
small cornicles are grouped under the name Neotrama. The genera 
may be separated as follows: 
Key to the Genera op the Tramina. 
1. Apterous form entirely without cornicles and with rudimentary eyes Trama. 
Apterous form with cornicles 2. 
2. Apterous form with large, broad, Lachnus-like cornicles and large distinct 
compound eyes Protrama. 
Apterous form with small cone-like cornicles armed with a few hairs and 
more or less rudimentary eyes Neotrama. 
Genus PROTRAMA, n. gen. 
Plate III, P-T. 
Head divided, front straight, eyes prominent and set off from the head. Antennse 
of six segments armed with hairs and small sub circular protruding sensoria. Cornicles 
situated on broad, low, hairy cones. Cauda and anal plate rounded. Hind tarsi 
extremely elongate. Wing venation faint; fore wings with the media twice branched ; 
hind wings with both media and cubitus present. 
Type, Trama radicis Kalt. 
Genus TRAMA, Heyden. 
Plate III, N. 
1837. Trama Heyden, Mus. Senkb., v. 2, p. 293. 
Head divided but not prominently so, front straight. Apterous form with the eyes 
reduced to a few facets. Antennse of six segments; cornicles absent; cauda subcorneal, 
rounded. Anal plate rounded. Entire insect minutely hairy. 
Type (mono typical), Trama troglodytes Heyden. 
