The forms treated of in this paper would naturally fall in the group for which Dr. J.B. Smith proposed the name Papaipema, and which Dr.Dyar in his catalogue accepted as a generic name, but as it was not so intended by the proposer, I do not know that it is necessary to accept it as such.

In 1902, while paying a brief visit to the White Mountains, from 6th to 10th August, I noticed that the plants of the Tall Meadow Rue(Thalictrum Cornuti, L). growing by the side of the road which runs from Fabyan's to the base of Mt. Washington, gave evidenc of having been attacked by some borer.

Clothed with cinereous pubescence, which on the dorsulum, face, second, third, fourth and fifth abdominal segments is thinly mixed with black; posterior tibiæ and metatarsi, the later largelym covered with whitish hairs; metatarsus with a broad brush of brown hairs on the apical margin; length about 15 mm … … ignava.

On the morning of March 24th, 1904, at 9 o'clock, in the town of Paris, Texas, many dark-coloured flies were noticed crawling over the trunks and lower limbs of two adjacent box elder trees (Negundo species). They proved to be the above species.

The recently-published article from the pen of Rev. Geo. W. Taylor, giving a rearrangement of the species now included under the genus Venusia, Curtis, under the same caption used by me in a previous paper, gives me, I think, a right to protest. He refuses to accept the separation of 12-lineata, Pack.? under a new genus, as given by me; but if the two male specimens, which were sent through the kindness of Mr. Geo.

Since the discovery of Wyeomyia Smithiiin the leaves of Pitcher plants in New Jersey, by Dr.J.B. Smith, it has been reported from Massachusetts and Florida.

On June 16tg of the present year, the writer found a larva of the second stage in a Pitcher-plant in a greenhouse in the Botanical Gardens, Washington, D.C. July 8th, three more specimens were taken there The plants had been brought from South Carolina, and had been in the greenhouse for several Years.

This destructive enemy of the housekeeper is evidently rapidly widening the area in Canada within which it occurs as a household pest. Strange to say, the species has been found abundantly on flowers out of doors in some localities where it has never been noticed inside houses. Twentyfive years ago many specimens were sent to me by a collector from Frot Mc Leod, N-W. T., and specimens are found in entomological collections in all parts of the Dominion.

♀.— Length nearly 19 mm.; length of anterior wing about 13 mm.; breadth of abdomen in middle 7 mm.; in all respects like M. Comanche, Cresson (co-type compared), except as folllows: Abdomen broader; fourth segment without a bare median area, the braod grayish-white band continued right across; fifth and sixth segments with the hari purplish-black, except the long hair at sides, which is paler and redder; hair of venter not so red; hair of inner side of basal joint of hind tarsi reddish-black, ferruginous basally: wings hardly so dark; hair-patch on mesothorax shorter, so that it is conspicuously broader than long; flagellum dark, with only a faint red tinge beneath; hair on outer side of basal joint of middle tarsi brownish-black (rufo-fulvous in Comanche).