220 
ZOOLOGICAL LITERATURE. 
Anisomera recta, Leconte, Ann. & Mag. Nat. Hist. 4th ser. iv.p. 376, Van- 
couver’s Island. 
Colymbetes latus, Fairmaire, 1. c. p. 191, Madagascar. 
Bhantus maryinatus, Steinheil, /. c. p. 260, Buenos Ayres. 
Cqpelatus 20-striatu6, Fairmaire, 1. c. p. 188, Mayotte, Comores. 
Dytiscides. 
Preudhomme de Borre (Ann. Soc. Ent. Belg. xii. pp. 107-111) makes 
some interesting observations on Dytiscus marginalis, $ , with smooth elytra 
(conformis, Kunze), and reports the result of his observations of a great 
number of that species, viz. that the posterior coxae vary somewhat in degree 
of acumination, so that the slight differences supposed to be attached to con- 
formis in that respect are valueless. The $ with smooth elytra is stated to 
be the rare exception (in Western Europe) in marginalis, but the normal type 
in circmncinctus and circumflexus. But at Kasan, in Russia, out of many 
hundreds of marginalis, $ , taken by Bullion, only one was found with sulcated 
elytra, and that but very feebly sulcated. The influence of this imperfect 
development on the Darwinian hypothesis is discussed by the author. 
Dytiscus anaztomozans is to referred to Von Well (in Von Jacquin’s Mis- 
cellanea austriaca) : Harold, Col. Hefte, v. p. 113. 
Dytiscus latissimus is recorded as Belgian by Weyers (Ann. Soc. Ent. Belg. 
xii. C. r. p. liii). Doyrolle {I, c. p. liv) remarks on this species. 
GYRINIDiE. 
Fairmaire (Ann. Soc. Ent. Fr. 4® s^r. ix. p. 192) notes the range of 
Gyrinus striatus (Fab.), from Southern Europe to Madagascar and New 
Holland. 
Sharp (Ent. M. Mag. v. p. 217) shows that the Gyrinus ccneusoi Stephens 
is practically non-existent, and (/. c. vi. p. 134) records G. stiffriani (Scriba) 
from Britain. 
Targioni-Tozzetti (Bull. Soc. Ent. Ital. i. fasc. ii. pp. 125-133) enters 
minutely into the structure of the legs in Gyrinus natator. He gives highly 
magnified figures (tav. 3. figs. 1-4) of the anterior, intermediate, and posterior 
legs, and of the marginal lamell£e. 
Gyrinus argentinus, sp. n., Steinheil, Atti Soc. Ital. Sci. Nat. xii. p. 251, 
Achiras. 
Dineutes bidens, sp. n., Snellen v. Vollenhoven, Bech. sur la Faune de 
Madag. p. 7, pi. 1. figs. 1 & 2, Mayotte. 
Palpicornia. 
Hydrophilus lateralis —striolatus (Lee.), which name is to be usedj 
H. nebulosus (^diy)=^pygmcmis (F.) ; Spheeridium apicalis (Say) =CfercyoR 
melanocephalum (L.). Zimmerman, Trans. Amer. Ent. Soc, ii. pp. 249-250. 
Fairmaire (Ann. Soc. Ent. Fr. 4® ser. ix. p. 195), as an additional proof of 
the artificial distinction between Hydrous and Stcrnolophus, notes that liis S. 
comoriensis accords well with the latter in the form of its mentum, but has 
the last joint of its maxillary palpi almost shorter than the third joint. 
C. O. Waterhouse (Euk M. Mag. v. p. 194), having examined the type ' 
