386 MR. G. R. CROTCfi ON AZOREAN COLEOPTERA. [Mar. 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 antennae red, the femora 

 and tibiae 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. (PI. XXIII. fig. 1.) 



T. oblongus, brunneus, granvlatus, setisfulvis erectis obsitus ; thorace 

 latei'ibus (Equaliter rotundatis, basi bisiiiuato ; elytris dlstincte 

 nodosis, antennis pedibusque rufo-piceis. L. I4-I2 ^^^' 



Hab. In ins. Fayal infra euphorbiam emortuam sat copiose captus. 



Head strongly granulated, sides swollen and elevated. Thorax 

 strongly granulated, sides bordered with stiff setse and broadly flat- 

 tened, 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 setse. 



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). PI. XXIII. 

 fig. 8.) 



E. rufo -brunneus, nitidus, pubescens ; fronts convexa, antice rotun- 

 data ; antennis riifo-testaceis, articulo 3° 2° sesquifere longiore ; 

 thorace latitudine longiore, a basi angustato, dense punctata, an- 

 gulis posticis breviter unicarinatis ; elytris brevibus, thorace haud 

 sesqui longioribus, striatis, striis punctatis, interstitiis planis, 

 parcc 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 closely resembles certain spe- 

 cies of Anchastus (A. rvfivellus') 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. 



