284 Appendix to the Proceedings 



PericalidsB. 



Rhaphidognatha, mihi (pacfrh and yvdOos). 



Corpus depressuin. Thorax postice obtuse-truncatus. Mandibular 

 projicientes. Labrum porrectum. Maxillae apice subuliformes. 

 Antennae breves, filiformes, leviter compressae, articulo secundo 

 vix tertio breviore. Mentum sine dente medio. Paraglossae ad 

 ligulam junctae. Oculi prominentes. Tarsi articulo quarto 

 simplici. Ungues non pectinati. Elytra basi quadrata, vix 

 thorace latiora, lateribus parallelis vel subparallelis. 



This new genus has more the aspect of one of the Lebiida 

 than of the Pericalidce, but the porrect labrum and ligula enve- 

 loped by the paraglossae show that it belongs to the latter. I 

 place it at the commencement of the Pericalidce, following Plo- 

 chionus (the last genus of the Lebiidte). 



1. R. trimaculata, mihi. PL XVI. fig. 2. 



Brunnea, nitida; elytris striatis, striis leviter punctatis, singulis 

 macula testacea basali, conjunctis macula testacea apicali 

 com muni. 



Long. 3f-4 lin., lat. li lin. 



Flattish and depressed. Chestnut-brown, shining; base of 

 antennse, mandibles and other parts of the mouth, margins of 

 thorax and elytra, tibiae and tarsi, somewhat paler; clypeus 

 large and smooth ; labrum smooth and projecting, emarginate in 

 front, fringed with hairs ; upper side of mandibles longitudinally 

 striated alongside of labrum. Head deeply and longitudinally 

 wrinkled on each side in front ; vertex also somewhat wrinkled ; 

 not wrinkled behind the eyes. Antennae not so long as head 

 and thorax ; all the joints very nearly of the same length, except 

 the second, which is a little, but not much, shorter than the 

 others ; also all nearly of the same thickness, except the first, 

 which is a little thicker ; the fourth and following joints are 

 slightly compressed ; and, viewed on the flat side, the antennae 

 appear slightly thickest about the middle. Thorax transverse, 

 rounded on the sides, widest a little before the middle, narrowest 

 behind; anterior angles prominent and rounded; posterior angles 

 obtuse, except at the extremity, which is very slightly excised 

 on the exterior side; the base is obtusely truncate; margins 

 broadly reflexed, most so behind, and rugosely punctate ; there is 

 a slight, narrow, but distinct dorsal line, not reaching to the an- 

 terior margin, but stopping at the anterior circular depression. 

 Elytra flat, about three times the length of the thorax, and 



