Aphididap of Formnsa. — 3. \\^ 



Anal plate not ainuated. Claspers hairy. Legs slender, with some moderate 

 or rather long hairs on the tibiae; tarsi not imbrieated, with a few minute apinules; 

 hind tarsi shorter than the Imse of the last antennal joint. Basal part of penis 

 chitinized. 



Length of body-about 1.4 mm- Antenna aljout 1.4 mm. 

 Fore wing-about 2.0 mm. 



The male differe from tlic winged oviparous female in the following characters: 



( 1 ) Body shorter, with the abdomen smaller. 



( 2 ) Head eom]iaratively large. 



( 3 ) Antennae longer; the 3rd joint slouter, shorter than the 4th, 5th and 

 6th taken together. (In the oviparous female the :?rd joint slender, almost as long 

 as the 4th, 5th and Ctii taken together). 



( 4 ) Hind tarsi shorter than the base of the Inst antennal joint. (In the 

 oviparous female hind tarsi almost as long as the base of the last antennal joint). 



( 5 ) Antennal sensoria transversely narrowed or oval, short, not encircling 

 the joints, present on the 3rd and succeeding joints. (In the oviparous female, 

 the sensoria encircle the joint and are present only on the 3rd joint, as in the 

 winged viviparous female). 



( 6 ) Cauda in shape almost as in the viviparous female, not globular, and 

 much smaller. 



( 7 ) Anal plftte not sinuated. (In the oviparous female the anal plate 

 almost bilobed, as in the; winged viviparous female). 



( 8 ) Hind tibiae not dilated, without sensoria. 



( 9 ) A pair of claspers present. 



Winged oviparous female 



Almost as in the winged viviparous female, differing. from it, however, in the 

 following characters : 



( 1 ) Cuuda very large, almost globular, scarcely constricted at the base, 

 black, covered with white secretions, with a few short hairs on the dorsal surface. 



( 2 ) Hind tibiae moderately dilated on the; basal half, provided with many 

 circular or oval sensoria that are mostly of medium size. ( In the winged vivipa- 

 rous female tlie hind tibiae slender, provided with 0-5 circular sensoria on the basal 

 half). 



Length of body-about 1.8 mm. Antenna-about 1.15 mm. 

 Fore wing-about 2.5 mm. 



