207 
joint 3 six times as long as 1 and 2 together; joints 4 and 5 
each half as long as 3, the terminal joint not being narrowed at tip. 
Thorax with the pronotuin welled defined, mesonotum having a 
thickened anterior border, with two small angles in front; the scutel- 
lar lobes and and pnescutum small. Tibiae with a lobe each side at 
juncture with tarsus, the basal joint of tarsus not distinctly separated 
and the tip furnished with two superior, knobbed hairs. Wings hya¬ 
line, the stigma and costal area fuliginous, the stigma pointed, but 
only slightly broadened; first discoidal almost transverse, second do, 
startiug from it at upper third; cubital running straight toward base 
of first discoidal, but usually obsolete at basal half ; terminal space 
between second discoidal and cubital wider than between it and the 
stignal. Hind wings with the hooks strong, the costal vein straight, 
and a single discoidal, the first being obsolete. [Out of 20 specimens 
examined, I find the basal portion of the first discoidal of front wing 
connecting with the second at base, either on one wing (2 specimens) 
or on both wings (4 specimens), and in two cases this hast discoidal 
is complete on one wing and incomplete on the other.] Larva quite 
broad and squarish anteriorly, with a frontal tubercle (Fig. 46, A), and 
with the antennae four-jointed; promuscis reaching to hind coxre; color 
brown, with mesonotal lobes more yellowish. Transverse dorsal rows 
of four piliferous spots are faintly observable. Antennae after first 
molt five-jointed, and promuscis hardly reaching to middle coxae. 
Pupa with similar antennae and somewhat shorter promuscis. 
Young from winged female (Fig. 4, e); Resembling the larva of 
preceding generation, but distinguished by the absence of frontal 
tubercle, and by having the surface, except mesio-ventrally, evenly 
and conspicuously granulated. The terminal joint of antennae also 
shows some constrictions (Fig. 46, g). 
Fig 1 . 46. 
This forms a gall (Fig. 46a) on the stems of the witch-hazel which 
gall is a deformation of the flower bud, the puncture , of the architect 
causing premature development, by which the calyx, bractlets, and 
petals are all changed into elongate bracts, more or less pointed ter¬ 
minally, and more or less completely soldered together at bases, so as 
to form a thin wall. In August, trie gall is green and crowded inside 
with lice in all stages of growth, from the newly-born to the pupa 
