HYDROPHILlDiE, STAPHYLINID^E. 
Ins, 25 
Hydrophilidad. 
Von Harold’s remarks on Japanese Hydrophilidce criticized by D. 
Sharp, Ent. M. M. xv. pp. 278 & 279. 
Hydrophilus piceus : notes on habits and transformations ; J. Fullagar, 
Sci. Gos. XV. pp. 132 & 133, woodcuts. Histological researches on the 
tracheae ; C. S. Minot, Bull. haut. etudes labor, d’histol. (2) iii., with 
plates. II. triangularis : habits and transformations popularly noticed ; 
W. Saunders, Cauad. Ent. xi. p. 223, fig. 14. IT. semicylindricus, Esch. ; 
characters discussed, it must be placed provisionally in Ilydrohius ; D. 
Sharp, Tr. E. Soc. 1879, p. 82. 
Philhydrus melanocephalus^ 01. Variation ; C. O. Waterhouse, Phil. 
Tr. clxviii. pp. 523 & 624. 
Spercheus emarginatus and Hydrous piceus. Habits ; V. R. Perkins, 
Ent. xii. pp. 214-216. 
New genera and species : — 
Omicrus, D. Sharp, Tr. E. Soc. 1879, p. 81. An aberrant form, which 
must be placed provisionally between Anaccena and Volvulus \ middle and 
hinder tarsi very short and rather stout, the joints compressed, and ad- 
justed to one another. Type, O. hrevipes, id. ihid.^ Oahu. 
Prosthetops^ F. H. Waterhouse, J. L. S. xiv. p. 63.3. Allied to Ilelo- 
phorus^ but differs from all known Philhydrida by the presence of two 
frontal ocelli. Type, P. cap>ensis, id. ibid., Cape of Good Hope. 
Hydrophilus hrevispina, Brisbane, and sabelliferus, Viti-Levu, L. Fair- 
maire, J. Mus. Godeffr. xiv. p. 80. 
Hydrochus obscuro-ccneus, id. 1. c.. Port Mackay ; H. smaragdinus, El 
Amri, and obtusicollis, Morocco, id. Le Nat. i. (1) p. 5, and Ann. Soc. Ent. 
Fr. (5) ix. pp. 159 & 160, 
Hydrcena acutipennis, id. J. Mus. Godeffr. xiv. p. 81, Brisbane. 
Berosus externe-spinosus (? = Hygrotophus nutans, Mad.), Rockhamp- 
ton, pallidulus, p. 81, sticticus, approximans, and stigma, ticollis , Peak 
Downs, and ovipennis, Port Mackay, p. 82, id. 1. c. 
Philhydrus sahariensis, id. Ann. Soc. Ent. Fr. (5) ix. p. 160, El Amri. 
Laccobius thermarum, Hot springs of Baden (Switzerland), and elon- 
gatus, Tangiers, Tournier, MT. schw. ent. Ges. v. pp. 436 & 437. 
Volvulus scaphiformis, Fairmaire, J. Mus. Godeffr. xiv. p. 83, Rock- 
hampton. 
Staphylinjd;e. 
Aleocharides. 
Ilyobates glabriventris, Rye, has priority over honnairii, Fauvel ; and 
Homalota planifrons, Waterh., and platycephala, Thoms., are quite dis- 
tinct, belonging respectively to Thomson’s genera Aloconota and ximischa : 
E. C. Rye, Deutsche E. Z. xxiii. p. 168. 
Homalogia egregia, Rye, = Liota hypogcca, Muls. & Rey, and probably 
