338 BET. H. S. GOEHAM ON THI [^V^- ^^i 



Ehtmbus tniacoLOE, sp. n. 



Orhicularis, valde convexus, ferrugineus, rufo-pubescens ; elytris 

 crelre, minute, disiincie punctatis ; antennis fulvis, articulis 

 duohus hasalibus et apicali dilutiorihus. Long. 1*75 millim. 



Hah. St. Vincent, leeward side {H. H. Smith). 



The size and form are precisely those of R. glohosus, and the 

 form of the thorax, the thoracic sulci, and the narrow reflexed 

 margins are similar ; the pubescence appears rather more ragged 

 and rather less thick (perhaps owing to less fine condition), but 

 the uniform colour very clearly distinguishes this little species, the 

 only part whicli diifers being the middle of the antennae and 

 the front portion of the thorax, which are darker rusty-red than 

 the rest, and the apical joint of the antennae, which is decidedly 

 pale. This species is evidently nearly allied to R. apicalis Gerst., a 

 Colombian insect, but is, I think, smaller, and better kept distinct 

 as an insular form for the present. Isine specimens were obtained. 



DiALEXIA. 



Dialexia, Gorham, Biol. C.-Am., Col. vii. p. 146. 



DiALEXIA PTTNCTIPENNIS, Sp. n. 



Breviter ohlongus, suhorhiculan?,parcepilosellus, castaneus, nitidxcs; 

 elytris parce punctatis ; antennis flavis, clava laxe triarticulata, 

 nigra ; prothoracis angulus posticos usque attingente. Long. 

 1 millim. 



Hal. Geesada : Balthazar, windward side {H. H. Smith). 



The genus Dialexia was formed for the reception of a minute 

 beetle {D. setxdosa Gorh.) from Guatemala, of which, as in the 

 present case, only a single specimen was obtained. They may be 

 compared with the European AspAdophori. The antennae are 

 9-iointed. In the present species there are faint indications 

 of basal sulci, in two short lines at the base of the thorax (as in 

 Ehymhus), and under the microscope (|-inch objective) the elytra 

 are distinctly but sparsely punctate. The determination of 

 ISIicro-Coleoptera, when oialy single specimens are sent, must 

 always at best be tentative. In the present case, however, the 

 minute insect here described is in perfect condition, and on re- 

 mounting it I was able to set out the legs and antennae, so that I 

 have no doubt of its position. The occurrence of a second species 

 more than 1500 miles from the original discovery is an interesting 

 fact, indicating the vast amount we have to learn about the distri- 

 bution and classification of these minute forms of insect life. 



The present insect is allied to Rhymhus minutus Gorh. and 

 Alexia minor Crotch ; and I would call attention again to my 

 remarks on those species, in the ' Biologia,' under Dialexia. 



I could not under any circumstances admit the specific identity 

 of any of these upon evidence drawn from single examples from 

 such distant localities. That must remain, I think, for some future 

 student, when larger numbers have been collected. 



