244 
INSECTA, COLEOPTERA. 
Dytiscides, 
Cyhister afrieanus, L^^.y^late^'alis, Y.y^itripunctatuSj 01. ; otoas, Lap.,= 
UnotatuSy Boh.,= himaculakiSy Aub6, ^immarginatuSy F. : Gerstacker, Arch. f. 
Nat. xxxvii. p. 43. 
Cyhister costaliSy 01., nec F., is changed to oliviei'i'^ Hydaticus ruficollisy F., 
nec Deg., to hanksi] fasciatusy F., nec Deg., to hxmterix Crotch, List &c., 
pp. 22 & 23. 
Trogus (Leach, 1817) cannot he used for Cyhister , Curtis, as there is a 
prior Trogus in the Ichneumonidce (Panzer, 1806) : Dye, Ent. Ann. 1872, 
p. 24. 
Lowne (M. Micr. J. v, pp. 267-271, pi. Ixxxix.), in a paper ^^On the so-called 
suckers of Dytiscus, and the pulvilli of Insects,’' maintains that the discs of 
the anterior tarsi in S Dytiscus are merely remarkably developed pulvilli, 
their adhesive power not being attributable to atmospheric pressure. lie 
gives highly magnified figures of their sti’ucture, compared with true pulvilli 
of other insects. 
Eunectes helvolus, Klug, is redescribed, from Madeira, by Wollaston, I e, 
p. 222. 
Hydaticus fascicollisy Harris, and zonatuSy Panz. Suffrian (S. E. Z. xxxii. 
p. 131) gives short characters for these, erroneously amalgamated in Mels- 
heimer’s catalogue. 
Dytiscus {Hydaticus) cinereus. SuflTrian (1. c. p. 132) refers to Schaum's 
statement of H. zonatus ancl hitineatusy and Aeilius mlcatus $ , being con- 
fused under this name in the Linnasan collection, in which no cinereus (as 
now known) exists, and considers the Aeilius accidentally introduced. He 
notes erroneous descriptions of the thorax of zonatus by various authors, and 
suggests that the $ of verrucifcTy Sahib,, has not been yet foirnd or is con- 
fused with Finland or Siberian males of. zonatus (cf. Kraatz, B. E. S, xv, 
p. 167). 
■ CyUster gayndahensisy Macleay, 1. c. p. 127, Gayndah j C. auritusy Gerst- 
acker, 1. c., Zanzibar : spp. nn. 
Eunectes punctipennisy sp. n., Macleay, I, c, p. 127, Gayndah. 
Gyrinid.®. 
Gyrinus eonvexiusculusj sp. n., id, 1. c. p. 128, Gayndah. 
Hydrophilid®. 
Hydrophilides, 
HydatotrephiSy g. n., id. 1. e. p. 129. Differs from Hydrobius in its 8-Jointed 
antennae, in not having the post, tarsi ciliated, and in its mesostemum being, 
prolonged into a tubercle between the interm, femora. H. mastersi, sp. n., 
id. l.c. p. 130, Gayndah (and many other Australian spp., sec. auct.). 
Hxjdrohaticusy g. n., id. 1. c. p. 131. ? Distinct from PhUhydrus, from which 
it differs solely in wanting a tubercle or carina on the mesostemum. H 
tristis and luridusy spp. nn., id. ihid.y Gayndah. 
Hygrotrophusy g. n., id. ibid. Differs from Berosus in its drooping head and 
the rounded base of its thorax. H. nutans and involutusy spp. nn., id. 1. o. 
p. 132, Gayndah. 
