Mr. G. J. Arrow on the Genus Rhysodes. 85 
exaratus, Serv. 
americanus, Lap. 
malabaricus, sp. 0. 
quadraticollis, sp. 0. 
Laprobane, Fairm. 
nYponensis, ‘Lewis. 
Boysi, sp. n. 
Head with lateral lobes approximating behind only. tudericeps, Fairm. 
bucculatus, sp. n. 
Head with lateral lobes approximating in the 
THC GION iaccB a « «oe POEs ae ia awl are anguliceps, sp. n. 
Head with lateral lobes fused with median eleva- 
LONE Paso: eee ahr at occur As Hac ieee pensus, Broun. 
Rhysodes armatus, sp. 0. 
Cylindricus, piceus, parum nitidus; capite post oculos supra et sub- 
tus utrinque producto, lobis posterioribus vertice biapproximatis, 
parcissime punctatis, spatio anteriore elevato brevi, medio con- 
stricto; prothorace elongato, antice semicirculariter arcuato, 
postice vix contracto, lateribus medio fere rectis, disco trisuleato, 
sulcis externis latis, carinis 4 fere parallelis, mediis 2 antice et 
postice jungentibus ; elytris late punctato-striatis ; corpore subtus 
grossissime punctato; tibiis anticis apice bidentatis, dente tertio 
mediano post apicem. 
3. tibiarum anticarum dente quarto paulo post medium femori- 
busque anticis medio dentatis, tibiis intermediis et posticis apice 
lamella longe bispinosa munitis. 
Long. 7-5-9 mm. 
Hab, Andaman and Nicobar Islands. 
‘The specimens were collected by the late Mr. Roepstorff, 
This species is very closely related to R. strabus, Newin., 
of which the type is in the British Museum, but may be 
distinguished by its rather longer and more parallel-sided 
prothorax and the coarser punctation in the elytral striz. 
These two species, together with &. crasstuscu/us, Lewis, 
differ from all others known to me by the remarkable arma- 
ture of the legs of the male, as well as by the perforation at 
the back of the head, which is very small and punctiform 
and distant from the median elevation. ‘There are also punc- 
tures upon the smooth parts of the head and thorax, which 
are characteristic of this small group. 
R. nicobarensis, Grouv., which inhabits the same islands 
as R. armatus, has a very different head, the median elevation 
extending into the posterior perforation, which is very large. 
Rhysodes malaicus, sp. n. 
Niger, nitidus, clongatus, capitis lobis prominentibus, supra paulo 
distantibus, antice et postice leviter convergentibus, spatio mediano 
