and Species of Coleoptera. 353 



Resembles R. pusillum^ Pasc. (Journ. of Entom, i. p. 326, 

 pi. xvi. fig. 3)*, but it has, inter alia^ considerably shorter 

 antenna, a prothorax about equal in length and breadth, and 

 the disk of the elytra with fom* costas, the second longer and 

 gradually obliterated behind. 



Rhypasma nanum. 



JR. ferrugineum, indumento griseo tectum; antennis articulo ultimo ut 

 in specie praecedente immisso ; prothorace transverse, confertim gra- 

 nulate, in medio planato, ad latera parum explanato, marginibus 

 vix crenatis ; scutello semicirculari ; elytris postice leviter angus- 

 tioribus, singulis disco quinquecostatis, costa interiore scutellari 

 vel brevi, quatuor exterioribus versus apicem confluentibus, inter- 

 stitiis biseriatim rugoso-punctatis ; pedibus rufescentibus, tarsis 

 posticis reliquis vix longioribus. Long. 1| lin. 



ffab. Amazons (Ega). 



The last joint of the antennae in this species is nearly as 

 obsolete as it is in Nosoderma ; and the prothorax is not longi- 

 tudinally excavated above, as in the other two species. 



EXENIOTIS. 



Caput parvum, retractum ; lahrum breve, sub clypeo insertum ; su- 

 tura clypeali nulla ; lohi oculares elevati, Oculi rotundati, fortiter 

 granolati. AntenncB validae, pilosse, ll-articulatse, art. prime cras- 

 siere, 3 sequentibus longioribus, cseteris ad octavum quadrangulari- 

 bus, 9., 10., 11. clavam fermantibus, duobus primis transversim tri- 

 angularibus, ultimo rotundato. Prothorax oblongus, antice utrin- 

 que calloso-lebatus. Scutellum invisum. Ehjtra elongata, postice 

 gradatim angustiora. Femora linearia ; tibi(B rectse, baud calca- 

 ratae ; tarsi vaUdi, cylindrici, subtus parce pilesi, articulo ultimo 

 caeteris conjunctim fere sequali. Prostemum latum, depressum, 

 postice angulatum. Mesosternum latum, antice emarginatum. Me- 

 tasternum elengatum. Coxcb anticae parvae, modice distantes. 



The only exponent of this genus is a singular-looking insect 

 covered, in a fresh state, with a crust, masking much of its 

 sculpture. The mentum, as it appears in situ, appears to be 

 large, transverse, hiding the maxillae, as in Rhypasma, to 

 which it is allied, and with a broad peduncle attaching it to 

 the jugulum ; the palpi and mandibles are deeply seated, and 

 the labium is very small and transverse. 



* In this figure the costse are not connected behind, and the short one 

 (second from the suture) only exists in the shape of a few rather more 

 elevated granules. The sculpture of the three species, however, is masked 

 by the remains of the crustaceous substance with which, probably, they 

 are entirelv covered in a fresh state. 



