126 



slender, obtusely subconic, excavated at the apex, with the extremities produced 



and acute. 

 Labial pulpi (PI. III., C, fig. 6, m) short and stout, 3-jointed ; 1 very small ; 2 large, 



subcylindric ; 3 scarcely narrower than the second, but twice shorter, sub- 

 quadrate, with the anterior margin fringed with short setae. 

 Lahntm (PI. III., C, fig. 3) large, suboljlong, rounded in front, and slightly emargi- 



nate in the middle, and enlarged near the base, with semicircular elevation in 



the form of a collar. 

 Mandibles (PI. III., C, fig. 4) simple, shaped like a sickle, serrated on the imier 



edge towards the base. 

 Maxillic (PI. III., C, fig. 5) unilobed, with the lobe large and robust, very strongly 



hooked, and armed with long, curved, and very sharp teeth. Stipes small. 

 Mentum (PI. III., C, fig. 6, j) suboblong, dilated at the base, and slightly concave 



anteriorly. 

 Labium (PI. III., C, fig. 6, k) long and rather narrow, slightly dilated towards the 



base, strengthened with nan-ow lateral costaj, and furnished at the apex with 



long, erect, and acute paraglosss. 

 Lingua (PL III., C, fig. 6, 1) small and narrow, almost entirely hidden by the palpi 



and paraglossse. 

 Pronutum rather large, with the anterior margin circularly rounded, but slightly 



concave at the middle, posterior mai-gin nearly straight, with the angles rather 



acute, but not produced. 

 Scutellunt small and i-ounded. 

 Elytra entire. 

 Wiwis ample, rather long, with the membrane very thin, oval, with the neuration 



normal, but faint, posterior margin fringed with short setae. 

 Abdomen composed of seven segments, the five basal coriaceous, and the two apical 



large, simple, and corneous. 

 Prothorax (PI. III., C, fig. 2, a) small, with the prosternum moderate, elevated 



between the coxffi, and produced, and moderately dilated posteriorly ; episterna 



minute and inconspicuous ; epimera moderate, enclosing the coxal cavities ; 



coxal cavities oval. 

 Pectus with the mesosternwn (PI. III., C, fig. 2, d) short and excavated in front ; 



episterna rather small, almost trigonal ; epimera humeral, rather long, widely 



distant from the coxal cavities ; coxal cavities rounded and rather remote. 

 metasternum (PI. III., C, fig. 2, g) rather large, not reaching to the sides of the 



body, with the posterior margin between the coxae straight ; episterna large and 



broad, as long as the metasternum ; epimera narrow, entirely concealed by the 



epipleural fold of the elytra. 

 Venter composed of six segments : 1 rather large, more than twice as long as the 



second ; 2-6 short, equal to each other in length. 

 Legs anterior with the trochanters small, trigonal ; femora moderate ; tibiae rather 



long, dilated towards the apex, and setose ; tarsi 4-joiuted ; 1 and 2 nearly 



equal ; 3 much smaller ; 4 elongate and slender ; claws moderate, slightly 



denticulate on the under side near the middle. 

 intermediate like the anterior, but with the second joint of the tarsi bifid. 

 posterior with the basal joint of the tarsi elongate ; in other respects similar to 



the anterior. 

 Coxa anterior suboblong, not contingent, nor prominent. 

 intermediate rounded, rather widely distant. 

 posterior rather large, pyriform, widely remote, extending to the episterna. 



This genus, which appears to be exclusively confined to the Atlantic Islands, 

 presents in the form of its thorax and pubescent surface of its body considerable 

 resemblance to the Sericoderiua ; but more properly belongs to this tribe on account 



