Vol. XXvi] ENTOMOLOGICAL, NEWS 15 



1908 KAMMERER, PAUL Symbiose zwischen Oedogonium undulatum 



und Wasser jungferlarven. Wiener-Fest-Schr. Wien., pp. 



238-252. 

 1908 LUCAS, W. J. Foes of Dragonfly Nymphs. The Entomologist, 



Vol. 41, p. 16. 

 1901 NEEDHAM, J. G. and HART, C. A. The Dragonflies (Odonata) 



of Illinois. Part I. Petaluridae, Aeschnidae and Gomphidae. 



Bull. 111. State Lab. Nat. Hist. VI, pp. 1-94. 

 1901 NEEDHAM, J. G. Aquatic Insects in the Adirondacks. Odonata 



Bull. N. Y. State Mus. 47, pp. 429-540, pis. 10, 17-25. 

 1903 NEEDHAM, J. G. Aquatic Insects in New York. Zygoptera. 



Bull. N. Y. State Mus. 68, pp. 218-276, pis. 5, 11-20. 

 1899 WILLIAMSON, E. B. The Dragonflies of Indiana. Geol. Surv. 



Indiana Kept., pp. 229-333, 7 pis. 



EXPLANATION OF PLATE I. 



Fig. i. A view of Cascadilla Creek. Collecting grounds in the fore- 

 ground. Photo by Anna H. Morgan. 



Fig. 2. Cascadilla Pond enclosure with nets and cages used in experi- 

 ments. The weeds and algal mats characteristic of the pond are 

 shown in the foreground. 



Fig. 3. Median gill plate of nymph of Enallagma cbriuin Hagen. 



A New Pieris from Cuba (Lepidoptera). 



By CHARLES T. RAMSDEN, Guantanamo, Cuba. 



Pieris menciae n. sp. 



Male: Expanse (one wing) 32 mm. Female: Expanse (one wing) 

 29.5 mm. 



$ . Primaries white, with the faintest tinge of yellowish glaucous 

 (Ridgway). The outer half of the costal edge and the upper half of 

 the outer margin, faintly ^dged with black. The central veins of the 

 primaries are overlaid with chalk-white scales, in the form of streaks 

 or bands 2.5 mm. wide ; they do not reach the outer margin. 



Secondaries of the same color as the primaries, with the chalky- 

 white scales confined mostly to the disk. 



Underside. Primaries as above, except that the costal edge and the 

 tips of the wings are ivory-yellow or massicot-yellow (Ridgway). 

 Secondaries immaculate and massicot-yellow. 



Thorax and abdomen white ; the legs the color of the underside of 

 the secondaries. Antenna? Mack above with the extreme of the club 

 sulphur-yellow. 



