A recent critical study of a number of species of Ludius Esch. has shown that considerable confusion exists in collections of the group, due largely to lack of adequate descriptions of the various species and to the artificial nature of the classification now in use. The genus Ludius, as now recognized in the American literature, is not a true genus in any natural sense, but is, rather, a heterogeneous group of species the natural affinities of which are not known. For purposes of classification, the species have been grouped primarily by characters of the antennae.

Length 5-6 mm. A slender elongate species, head and body piceous with testaceous prothorax, medianally black on the pronotum and ventrally testaceous to black, the elytra dark brown and faintly shining. The head is rather finely,sparsely punctured, the antennae slender, piceous to brown, with the third segment 2½ to 3 times the length of the second and longer than the fourth, extending to approximately the middle of the elytra.

The 1933 experiment in hybridizing Tropaea luna with Actias selene closed in the following manner:

Cocoons of Actias selene, formed in August, hatched in September, and the moths mated. A second brood of larvae was reared on rose leaves (purchased wholesale after the winter set in) but, owing to the difficulty of keeping this food supply fresh, the disease called Flatchery claimed all of the brood except one larva. The single cocoon, spun in December, gave us a female the following June, but this moth refused to mate with males of Tropaea luna.

While determining a collection of interesting Histeridae taken by the writer and others in Mexico during the past few years, three species were found to belong to the genus Pseudister Bickhardt. As two of these were undescribed, and as one species described from New York and one from Paraguay have been masquerading for many years under a different genus, the following short review is necessary to straighten out the existing confusion. Through the kindness of Dr. K. G. Blair and Dr H. Scott of the British Museum, types of all the species considered in this paper have been examined by the writer.

In 1929 the writer described a British Columbian blackfly pupa with most unusual characteristics—unique among North American species in that the customary slender respiratory filaments are replaced by a closed, ringed, club-like horn with tw-o short, curved basal spurs. An examination of the literature at our disposal of the pupae known from Europe, Africa, Asia, Australasia and South America, indicates that a number of other unusual forms have been described, especially from Africa. Although the valid species of Simuliidae in the world fauna probably number more than three hundred and fifty, only about twelve of the known pupae of which we have records have breathing organs that are not of the filamentous type. In Northern Europe, Simulium equinum L., as described by Edwards and Puri, has breathing organs consisting of wide, thin-walled tubes, the basal and main branches of which form a ring on the thorax.

Argynnis cybele Fabr. is generally distinguished from the closely allied A.aphrodite Fabr. by the following two features : (I) the veins of the central area of the primaries in the male sex are thickened by sex-scales; (2) on the underside of the secondaries the yellow submarginal band is broad and clear and not invaded by the red-brown color of the basal section.

While collecting in Nova Scotia during the months of June aud July, 1934, at South Milford and at White Point Beach, near Liverpool, I took a series of an Argynnid which struck me at the time as strongly resembling aphrodite on the underside but which on the upperside of the forewings showed the heavy sex-scaling on the veins in the male sex which would consequently indicate cybele.

In a box of Coleoptera sent me by Mr. C. P. Alexander of the Massachusetts State College for determination I found the following interesting records:

Pachyta liturata Kby. One specimen bearing the label, “Northwest River, Lab. VIII-15-1929. Coll. F. C. Sears.”

Anoplodera hirtella Lec. One specimen with the label, “Northwest River, Lab. Summer of 1933. F. C. Sears Coll.” This may be a synonym of tibialis Lec.