116 Bulletin of the Brooklyn Entomological Society Vol. XV 



The galls start about April, attaining their full growth and de- 

 velopment toward the end of May. The stem-mother is wing- 

 less, but the females of the second generation always have wings 

 and migrate to Quercus glandulifera, or closely related species, 

 in June. 



The females of the third and some of the succeeding genera- 

 tions on the summer hosts are wingless and stationary as in 

 Aleurodes, being firmly cemented to the leaf. 



The winged sexuparas appear in October and November and 

 return to the winter host to produce sexual forms. 



The oviparous female, as well as the male, has no wings, but 

 possesses a well developed rostrum, as is characteristic of the 

 Hormaphidina, to which Nipponaphis belongs. 



Description. 

 Migrant (Second Generation). 



Color: Head, eyes, antennae, legs and mesothorax black. 

 Abdomen brownish yellow. Wings pale dusky, veins pale 

 brown. 



Morphology: Body oblong, broadest at the middle of the ab- 

 domen; without hairs. Head very short, without frontal 

 tubercles; eyes very large; antennas short, not slender, the 

 two nasal joints, as usual, shortest and nearly subequal in 

 length, the remaining three joints cylindrical and of almost 

 equal thickness, the third longest, nearly equal in length to the 

 fourth and fifth combined, and divided by eight or nine annu- 

 lations ; fourth and fifth segments nearly equal in length, each 

 provided with from three to five annulations. Rostrum not 

 reaching the middle coxae. Fore wings not narrow ; stigma 

 large ; the first discoidal thicker than the remaining veins ; 

 first and second discoidals arise quite near one another, the 

 third with one fork, obsolete at the base; stigmal vein ter- 

 minating at the apex of the wing. Hooklets on the hind wing 

 two in number. Abdomen with some very small tubercles on 

 either side ; cornicles represented by pores only ; anal plate bi- 

 lobed ; cauda very short and not prominent. 



Legs slender, with some fine short hairs and also with four 

 long capitate hairs. 



Length of body — 1.4 mm. Length of antenna — 0.35 mm. 



Length of fore wing — 1.8 mm. Width of fore wing — 0.7 

 mm. 



