This species has hitherto been considered identical with Aleyrodes vaporariorum, the common greenhouse Aleyrodes of the tomato, cucumber, etc. A critical study of all stages of both the greenhouse Aleyrodes and the strawberry Aleyrodes, made at the Entomological Laboratory of the Massachusetts Agricultural College, has resulted in finding structural differences between the two species in all the stages, except the egg and adult.

Among some hymenoptera recently received from Mr. A. Gordon Leavitt, of St. John, N. B., is a very interesting male of Thyreopus latipes, Smith. The sexes of this genus are readily separated, as the males have the anterior legs remarkabty modifed; the tibiæ: especially being developed in broad shields, or leaf-like expansions. The antennæ are simple in the female, but those of the male have the flagellum fusiform and compressed. In T. latipes the basal joints are broad, and the flagellum narrows from the second joint to the apex.

The small Coccinellidæ commonly known as Smilia are among the more important natural enemies of the Coccidæ. The name Smilia properly belongs to a well-known genus of Homoptera, so in Science Gossip, 1900 p. 606, I proposed to call the Coccinellid genus Epismilia. I now learn from the Index Zoologicus that Epismilia was used in 1859 for a genus of Coelenterates. I therefore propose another name for Smilia, Weise, namely Microweisea. The North American species are Microweisea misella (Lec.), M. marginata (Lec.), M. coccidivora (Ashm.), M. ovalis (Lec.), M. atronitens (Casey), M. minuta (Casey), M. planiceps (Casey), Mreversa (Fall); all standing in our lists under Smilia.

By most systematists this family is still classifed with the Scoliidæ, although separated as a distinct family by the Swedish entomologist, C.G. Thomson, as early as 1874. I agree with Thomson, and belive these wasps form a distinct family, easily recognized by the characters made use of in my table of families.

The genus Engycistus, Fox based upon Myzine rufiventris, Cresson, was classifed by Cresson, Cameron and Fox with the Scoliidæ. Mr. Fox has kindly sent me specimens for examination, male and female, and I find them true Tiphiids; they have nothing to do with the Myzinidæ or Scoliiæ as now restricted.

The genus Pterombus, Smith, still unknown to me in nature, also evidently belongs here.

Hypolæpus Viereckii, sp. nov.—Dark, abdomen whit beneath, legs partly white, wings hyaline, nervures whit at base. Length, 7–8 mm.

♀. — Head shining black; face below the insertion of the antennæ, a narrow band between the antennæ and the eyes, head above the eyes, and the temples, white; antennæ black, nine-jointed, third slightly arcuate, thicker and longer than the fourth, which is in turn longer than the fifth, and so on to the last. Thorax shining black, laterally in front of wings white; wings hyaline, nervures brown, whitish at base of wing; first transverse cubitus transparent, without colour, second submarginal cell receiving two recurrent nervures, lanceolate cell petiolate, only one marginal cell; legs dark brown, all coxæ and trochanters, tibiæ execpt tips and basal third of posterior femora, white; posterior tibiæ slightly enlarged, longitudinally sulcate, first joint of posterior tarsi as long as the other three combined, the last joint being especially short.

In Professor T.D.A. Cockerell's “ First Supplement to the Check-list of the Coccidæ” (published in the bulletin of the Illinois State Laboratory of Natural History, 1899), the following footnote occurs on page 398: “Phenacaspis, Cooley an Ckll., will be a new genus, to include P. nyssæ, Chinensis, engeniæ, etc., hitherto placed in Chionaspis. Mr. Cooley and the present writer agree that these forms have no generic relationship with genunie Chionaspis except through Aulacaspis and Diaspis. I leave Mr. Cooley to publish the generic characters, and classify the species.”

The new Catalogue of the Lepidoptera of North America which I have prepared has been issued as Bulletin No.52 of the United States National Museum. It comprises 740 pages. The edition is being distributed by the Smithsonian Institution, without charge. Those not receiving the publications of the National Museum regularly, and who are interested enough in entomology so that this publication would be of practical use to them, will be cheerfully recommended by me to receive a copy, on making application to the undersigned.