1NEW AND lilTTLE-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 Byfleet 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 cyathigerum 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. E. South was kind enough to examine the 

 prey, and identified it as the Pyralid moth Scoparia amhigiLalis. 

 Another male of E. cyathigerum with prey was taken at the same 

 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 cyathigerum near Ruislip, 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 

 puella (June 11th). On the later date named our captures of 

 I. elegans included immature as well as mature specimens, and 

 var. female rufescens was also taken. Many of the females 

 had the abdomen smeared with mud, as though they had been 

 ovipositing. A visit to Lechlade, Glos., on September 1st 

 (H. J. Watts) resulted in the capture of S. striolatum, M. grandis, 

 and E. cyathigerum. 



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 

 oi Philibertella Jiava (Meyer), Cockerell; 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. 



