No, 2.] Original C ommunications. 51 



The expanded winged female measures 0*36 x o'li inch. The 

 rostrum is short and equal to the width of the thorax. The 

 smaller-winged forms, I believe to belong to an earlier brood, as they 

 did not appear to be males. 



Pupa entirely yellow ; size, o" 15 inch. Foundress globose, shin- 

 ing yellow. Antennas very short, black, and obscurely five-jointed. 

 Rostrum stout and short. Eyes none, legs black. Size o' 11 x 

 0*09 inches. 



JPempTiigiis immuniSf n. sp. 



This insect forms rather large galls, — i'2o x I'lo inches, on the 

 Aspens growing at Bunji on the road to Gilgit. Specimens 

 gathered at an elevation of 4,600 feet, and preserved in alcohol, 

 show a hard woody exterior. Sometimes they have a rough surface, 

 like that of a walnut shell ; whilst others show a quasi imbrication, 

 as seen in the figure. The interior is thrown into smooth 

 but deep furrows. The aperture near the apex has rough 

 corrugated edges, or lips, like the excrescences made by P, bur- 

 sarins of Europe, The galls made by P, immunis are much 

 larger than those made by P, napaeus^ the last described species 

 and they differ in several particulars from those made by P, 

 bursarius. 



Winged viviparous female. Head and thorax more or less shiny 

 piceous brown, not black. Abdomen green, mottled with yel- 

 low ; head rather narrow. Antennae short, black, five or obscurely 

 six-jointed, the third joint hardly at all ringed ; the last joint often 

 dilated at the tip. The wing veining is much like that of P. nap- 

 seus, but much paler, and the stigma faintly brown. All the upper 

 side of the thorax brown ; but this tint is confined to a saddle 

 shaped dark spot on the sternal aspect. Eyes rather small, legs 

 black. 



The whole insect is more slender and more ovate than is seen 

 in P. nap3eus. In the colour of the thorax and abdomen, it also 

 differs from P. bursarius. These characters, coupled with the 

 different habitats, and the appearance of the gall structures, justify 

 a separation from either of these species. 



The pupse are stout, ovate, greenish yellow, with short wing-cases 

 and dark legs. They are numerous in the interior of the galls. Size, 

 o 08 X o'04 inch. 



