80 EDWARD NORTON. 



thought best to consider it the same, especially as I have received spe- 

 cimens from several quarters, as taken on the willows. Mr. Walsh 

 found his galls on the S(dix humi/is. " The lateral bud of a twig en- 

 lar^-ed so as to be twice or thrice as long, wide and thick as the nati - 

 ral bud, before it begins to expand in the spring," otherwise externally 

 unchanged. Internally "it contains early in the autumn a homogeneous 

 grass-green fleshy mattei-, which is afterwards gradually consumed by 

 the larva, leaving nothing at last but a mere shell, as thin as paper, 

 and partly filled with excrement. The gall is monothalamus, some- 

 times one only on a twigj sometimes two or three, or more, at irregular 

 intervals, rarely as many as three or four found out of three or four 

 consecutive buds. Common, but not local. Described from thirty- 

 four specimens Length, .17 — 36 inch; breadth, .10 — 17 inch. 



Jjarva. — The larva is twenty-footed, and on Oct. 2, is 13 — 19 inches 

 lono-, of a greenish white color, the head tinged with dusky, and with 

 the usual fuscous eye spots. Mouth dusky. At this date, few galls 

 were already bored, and the other larvae not long after this bored out 

 and retired an inch or so under ground, where they spin a thin, whitish 

 silken cocoon, to which many particles of earth adhere externally." 



This statement is very interesting, as well as all the observations of 

 Mr. Walsh on this subject, which the length of this paper will not 

 admit of being reprinted in full. 



E. s. ovum. 



Euura s. ovum, "Walsh, Proc. Ent. Soc, Phil., vi, 1866, 252. 

 $. Length, .17—12 inch. Br. wings, .36—48 inch. 



" 5 . Shining honey-yellow. Head with the eyes, a square spot en- 

 closing the ocelli, but separated from the eyes by a pretty wide orbit, 

 and also the tips of the mandibles, all black. Clypeus emarginate in a 

 circular arc of about 90°. Labrum rounded at tip. Occiput more or 

 less clouded with black on the disk. AntennjB dull rufous above, with 

 their basal half black, honey-yellow below, with the scape black, and 

 more or less of the basal half of the flagellum dusky, three-fifths as 

 long as the body, joints 3 — 5 subequal, 4 slightly the longest, 5 — 8 

 very slowly shorter and shorter, 9 full as long as 8. Thorax with an 

 oblong spot on the anteriin- lobe of the mesonotum, generally extend- 

 in"- from the collare two-thirds of the way to the hind angle of the 

 lobe, rarely covering almost its entire surftvce, the interior half of each 

 latei-al lobe and sometimes its entire surface, base and tip of the scutel 

 and rarely its entire surface, anterior disk of the metanotum, and the 

 edo-es of the basal plate that border on the basal membrane, or rarely 



