38 K. Takahasbi 



shed with a icw very sliort ones. Cornicles ratliei' stout, very slightly dilated about 

 tlic middle, scarcely or very slightly expanded at the base, almost 4 times as long as 

 wide, stouter than the hind tibia, longer than" the 3rd antennal joint, a little more 

 than twice as long as the cauda, neither imbricated nor reticulated. Cauda almost 

 triangular when seen from aliove, almost as long as to somewhat shorter than the 

 hind tarsi, somewhat wider than long, provided with 3 pairs of lateral bristles. Legs 

 long; tibiae stouter than the antenna; front and middle tibiae provided witli some 

 moderately long setae; hind tibiae provided with some very long bristles; tarsi unbri- 

 cated; hind tarsi longer than the base of the last antennal joint. 

 Length of body-about 1.5 mm. Antenna-about 1.3 mm. 



The third instar dift'ei-s from the second in the following characters: 



Antennae^ 6-jointed. AV'iug-pads beginning to appear. Coi'nicles and cauda 

 longer. 



(The fourth instar) Colour almost as in the third instar. 



(Wingless form) Body oval. Head provided with a few minute liairs. 

 Frontal tubercks distinct, with tlie inner side slightly convex. Antennae 6-jointed,' 

 provided with a few minute slightly knobbed hairs; the 1st joint larger than the 2nd; 

 the 3rd not imbricated, without sensoria; the 4th imbricated; the 5th witli the apical 

 sensorium small, much longer than the basal two joints taken together; the relative 

 length of joints as follows: IIL79, IV-60, V-55, VI-145 (25+120). Rostrum 

 reaching the middle coxae. 



Body M'ithout tubercles. Abdomen provided with a few very short hairs. 

 Cornicles about 5 times as long as wide, rather stout, somewhat expanded about the 

 middle, slightly dilated at the base, much stouter than the hind tibia, almost as long 

 as the 3rd antennal joint, more than twice as long as the cauda. Cauda stout, much 

 stouter tliau the cornicle, broadest at tiie Imse, tapering, almost as long as wide, with 

 the apex rounded, slightly longer than the hiud tarsi, with about 3 pairs of long 

 bristles. Legs long; front and middle tibiae provided with many moderately long 

 setae; hind tibiae with many very long bristles; tarsi imbricated; hind tarsi a little 

 longer than the base of the last antennal joint. 



Ijcngth of body-about 2.1 mm. Antenna-about 1.7 nun. 



(Winged form). Almost as in the wingless form. 



The relative length of antennal joints as follows: III-80, IV-55, V-50, VI- 

 123 (23+100). Wing-pads well developed. 



Length of body-about 2.2 mm. Antenna-about 1.7 mm. 



