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Show 386 MR. G. R. CROTCH ON AZOREAN COLEOPTERA. [Mai*. 28, tellum smooth. Elytra extremely finely and slightly reticulate, having almost the appearance of a sparse punctuation, with the three series of impressed lines confused together in the posterior third. In the female both elytra and thorax are coarsely but very closely reticulated and opaque, the impressed punctures becoming invisible, and the colour deepening to dark brown. Body beneath black, margins of the segments paler. Legs and antennse red, the femora and tibiee sometimes infuscate. This species, in its singular disparity of sex, approaches A. dispar, Bold (uliginosus, Payk.) ; but this peculiarity is not always present, at least not in other species. They both (A. dispar and A. congener) have opaque females in England, though not in Sweden. Hydaticus zonatus varies in the same way. TARPHIUS WOLLASTONI, n. sp. (Pl. XXIII. fig. 1.) T. oblongus, brunneus, granulatus, setis fulvis erectis obsitus; thorace lateribus eequaliter rotundatis, basi bisinuato ; elytris distincte nodosis, antennis pedibusque rufo-piceis. L. I4-I2 Hn. • Hab. In ins. Fayal infra euphorbiam emortuam sat copiose captus. Head strongly granulated, sides swollen and elevated. Thorax strongly granulated, sides bordered with stiff setee and broadly flattened, towards the base somewhat contracted, in front produced, acuminate; disk uneven, with a longitudinal channel at times very well marked, but often obsolete. Elytra deeply punctate-striate and transversely rugulose, the nodules well developed and clothed with short pale setee. I have named this species in honour of Mr. T. V. Wollaston, in default of whose unwearied exertions our knowledge of this genus would be still confined to its solitary European representative. ELASTRUS DOLOSUS, n. sp. (E.W. Janson in litteris). Pl. XXIII. fig. 8.) J E. rufo-brunneus, nitidus, pubescens; fronte convexa, antice rotundata; antennis rufo-testaceis, articulo 3° 2° sesquifere longiore; thorace latitudine longiore, a basi angustato, dense punctato, posticis breviter unicarinatis; elytris brevibus, thorace sesqui longioribus, striatis, striis punctatis, interstitiis parce punctulatis; pedibus rufo-testaceis. L. 3^ lin. Reddish brown, shining, sparsely clothed with a short yellowish-grey pubescence; head pitchy black; antennae, legs, and anterior angles of thorax rufo-testaceous. Mr. Janson, to whom I am indebted for the above description of this interesting species, adds that it so closelv resembles certain species of Anchastus (A. rufivellus) as on a superficial inspection to be mistaken for them. He goes on, however, to say that the total absence of membranous tarsal appendages precludes its location among the Myorhinites. This genus is hitherto peculiar to Madagascar ; and its occurrence in the Azores is hence somewhat remarkable. v |