36 ENTOMOLOGICAL SOCIETY Hunter, Jenne, Johnson, Kraus, Marsh, Morgan, Piper, Quaintance, Schwarz, and Van Horn, members, and Messrs. Geo. G. Ainslie, Paul Hayhurst, and Albert Mann, visitors. Mr. Charles R. Ely, of Gallaudet College, Kendall Green, Washington, D. C., was elected an active member. The first paper on the program, " A New Tetranychus " by Mr. Nathan Banks, was read by title. It is as follows : A NEW TETRANYCHUS. [Acarina, Tetranychidse.] By NATHAN BANKS. Tetranychus opuntiae, n. sp. Color wholly bright red. Body rather more elongate than usual ; with the usual bristles, but all very long, those on shoulders more than one-half width of body, none of them on tubercles. Palpi long, penulti-mate joint ending in a stout spur overlapping in part the next joint, thumb with a very stout finger, truncate at tip and bearing a hair on each side, one of them very stout, and on upper side of thumb a slender finger. The mandibular plate long, tapering somewhat lo the rounded tip, which is not emarginate in the middle. Legs large and long, and having very long bristles ; femur I about twice as long as tibia I, and tarsus I nearly as long as femur, the large mid-dorsal bristle of tarsus I as long as the joint; claws four-cleft. This species occurs on prickly pear cactus (Opuntia} in Texas ; it was collected by Mr. D. Griffiths of the Department of Agriculture, mostly near San Antonio, in March. It is very injurious to the cacti. The following paper, in the absence of Mr. Knab, was read by the secretary: THE EARLY STAGES OF SAYOMYIA PUNCTIPENNIS SAY. [Diptera, Culicidse.] By FREDERICK KNAB. Sayomyia punctipennis appears to be the most common species of its genus in the upper Mississippi Valley and al-
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