MONOPLATtTS. 15 



Oblong-ovate, parallel, subcylindrical, punctate-striate, of a pale 

 testaceous colour. Head transverse, slightly produced ; between the 

 eyes {immediately adjoining the base of the antenna?) is a minute 

 obliquely angulated fovea, in the form of the letter V; between 

 these two depressions is an obsolete elongated puncture (medial and 

 longitudinal) ; the eyes are large, prominent, and globose, situated at 

 the base of the head, and extending laterally nearly as far as the 

 anterior angles of the thorax ; surface impunctate, black, glabrous ; 

 near the posterior and inner margins of the eyes are two obscure 

 fuscous spots. Thorax transverse, rectangular, hardly emarginate in 

 front; the anterior angles are subacute and depressed; the sides 

 marginate; at the base is a narrow and well-defined transverse 

 groove, extending parallel to the line of the base, which terminates 

 abruptly (before it reaches the sides) by being inflected at right 

 angles to the posterior margin ; the surface is impunctate throughout 

 and rufo-flavous. Scutellum triangular, impunctate, flavous. Elytra 

 broader than the thorax, parallel, subdepressed, slightly acuminated 

 at the apex, punctate-striate (the striae being almost obsolete, and 

 the punctures distinct and evenly distributed throughout) ; an ob- 

 solete antemedial depression (apparent when viewed laterally) gives 

 a prominence to the surface near the base : two transverse black 

 fasciae (the one at the base, the other near the apex) are interrupted 

 at the suture, and thus form four black spots ; those at the base are 

 distant from the suture by the breadth of rather more than a single 

 stria ; they extend towards the apex one -sixth of the whole length 

 of the elytra (or two-fifths of a line), their posterior margin being 

 subsinuate in outline ; at the sides they reach, but do not colour, the 

 line of margination : the apical markings are separated by a single 

 stria from the suture, and immediately approach, but do not reach, 

 the apex ; in form these are subcircular. Antenna long, filiform ; 

 the joints one to four flavous, five to eleven fuscous. Legs flavous 

 throughout. 



From the neighbourhood of Petropolis (Organ Mountains), Feb. 

 1847 ; the only example taken by us being a male. 



12. Monoplatus semichalybeus. 



M. oblongo-ovatus, parallelus, punctato-striatus, ferrugineo-rufus, 

 glaber ; capite brevi, inter oculos transverse foveolato, impunctato ; 

 thorace transverso, ad basin subconstricto et transverse foveolato, 

 ad latera marginato, impunctato ; elytris parallelis, punctato- 

 striatis, ad apicem dimidio nigro-cyaneis ; antennis filiformibus, 

 nigro-fuscis, art. 1-3 rufo-flavis ; pedibus rufo-Jiavis. 



$ Long. corp. 2|—2f lin., lat. 1 lin. 



