92 Psyche [August 



or 10. Cornicles 0.176 mm. long, tapering near the base, then very 

 slightly enlarged, then again slightly tapering; distal extremity 

 with a distinct flange and the entire cornicle distinctly imbricated. 

 Hind tibiae 0,656 mm. long. Ocelli present, thoracic structure 

 suggesting that of an alate form. Length from vertex to tip of 

 Cauda 0.944 mm. 



Intermediate male : General color similar to that of the apterous 

 form, the abdomen, however, appears to be slightly lighter. 

 Antennae with the following measurements: Segment III, 0.304 

 mm.; IV, 0.192 mm.; V, 0.192 mm.; VI (0.08+0.416). Sensoria 

 present as follows: Segment III, with about 22 circular sensoria 

 not arranged in a row, IV, with about 20 sensoria, V, with about 

 16. Cornicle 0.192 mm. long, similar in shape to the cornicle of 

 the apterous form. Wings represented by leaf -like structures 

 about 0.368 mm. long and about 0.192 mm. wide. These struc- 

 tures sometimes show one or two veins. Head and thorax like 

 that of the alate form. Hind tibiae 0.672 mm. Length from ver- 

 tex to tip of Cauda 1.04 mm. 



Alate male: Color similar to that of the forms previously de- 

 scribed. Wings hyaline, veins and stigma dark. Antennae with 

 the following measurements: Segment III, 0.32 mm.; IV, 0.256 

 mm.; V, 0.256 mm.; VI (0.096 mm. +0.448 mm). Sensoria as 

 follows: Segment III, with about 17 circular ones more or less in 

 a row; IV, with about 17; V, with about 17. Forewing with the 

 stigma near the distal extremity of the wing, so that it is quite 

 curved on its costal margin, media once branched, cubitus distinct, 

 anal absent, length 1.152 mm. Hind wing about 0.656 mm. long 

 and with one oblique vein. Cornicles 0.16 mm. long, similar to 

 those of the other forms already described. Hind tibia 0.672 mm.; 

 length from vertex to tip of cauda 0.96 mm. 



Found on the sedge in company with the oviparous females, 

 often very close to the ground. 



Ovipara. 



The oviparous form occurs on the sedge at the same time as the 

 males, and these forms are present depositing eggs until cold 

 weather. 



First instar. General color dusky with dark appendages. An- 

 tennae of four segments with measurements as follows : Segment I, 



