NEW AND LITTLE-KNOWN BEES. 175 ponds again for water-beetles on several occasions, and as recently as 1909. According to Mr. Watts' observations, Erythromma naias had a very°long season, for he took his first specimen (a female) at'Bylieet on May 21st, and his last (two males at Wisley) on the exceptionally late date August 20th. Pyrrhosoma tenellum was found at the Black Pond on June 16th, 18th, and 20th, but the specimens obtained were rather immature. The species was met with there, also, on August 24th and 27th. Again, at the Black Pond (June 20th), a number of males of Enallagma cyathigenun were flying over grass, and one of them was seen to be carrying prey. It was captured, but was un-fortunately allowed to escape, although it left its victim behind it in the net. Mr. Pt. South was kind enough to examine the prey, and identified it as the Pyralid moth Scoparia ambigualis. Another male of E. cyathigenun with prey was taken at the sape place on June 18th ; in this instance the dragonfly was feeding on the common little moth Tortrix viridana. The capture of Erythromma naias, Ischnura elegans, and Enallagma cyathigeriim near Piuislip, Middlesex, on May 28th, may be recorded for the sake of the locality. _ For the same reason, also, we may mention the following species taken on the Grand Junction Canal in the Uxbridge district -.—Calopteryx splendens, male and female (June 4th), Pyrrhosoma nymphula (June 4th), Ischnura elegans (June 4th and 11th), and Agrion piiella (June 11th). On the later date named our captures of /. elegans included immature as well as mature specimens, and var. female riifescens was also taken. Many of the females had the abdomen smeared with mud, as though they had been ovipositing. A visit to Lecblade, Glos., on September 1st (H. J. Watts) resulted in the capture of S. striolatum, M. grandis, and E. cyathigeriim. 58, Eanelagh Road, Ealing : April 13th, 1912. NEW AND LITTLE-KNOWN BEES. By T. D. a. Cockerell. Megachile aricensis, Friese. Piura, Peru, March, 1911, and April 28th, 1911, at flowers oiPhillhertellaJlava (MQyQx),QoQVQYe\\; two males collected by C. H. T. Townsend. New to Peru. The Philibertella was recorded somewhat doubtfully in Ann. Mag. Nat. Hist., August, 1911, p. 285; I sent the specimen to Dr. "N. L. Britton, who expresses the opinion that my identification is correct.