336 Rev. A. Matthews on 



ulsky, while I enjoyed the advantage of his correspondence, 

 assured me that I should find those which he had separated 

 to be true and genuine species when examined under a 

 magnifying-power sufficiently high to render the superficial 

 scul])ture clearly visible ; and this I found to be true in forty 

 out of forty-two types which he had kindly sent. And I 

 feel no hesitation in saying that any one who will take the 

 same trouble will come to the same conclusion, and that 

 opinions formed without such examination, and sometimes 

 without any examination at all, can be of no real value. 



Among tlie Corylophidaj Saci'um mstabile is a very pretty 

 and interesting addition to its genus ; like its congener 

 S. Oberthuri it varies much in the disposition of the yellow 

 markings on its elytra. The two species of Arthroh'ps are 

 insignificant, but very distinct ; they are each represented by 

 a single example. Sericoderus nn'mttus is a new and distinct 

 species, and, what is very unusual in that confusing genus, 

 easily recognized. Bhypohius dissimiUs difiers much in form 

 from any of its congeners, but agrees with them entirely in its 

 anatomy, especially in the elongate linear mandibles. I have 

 already described Orthoperus pjerpusillus in the ' Biologia 

 Centrali-Americana' from specimens taken in xsicaragua by 

 Mr. E. Janson. It appears to be excessively abundant in the 

 West-Indian Islands. 



Corylophidae. 



List of Species. 



Sacium instabile, sp. n. Corylophodes pusillus, sp. n. 



Artlirolips iunotabilis, pp. ii. Eliypobius dissimilis, ?p. n. 



iiitidus, sp. n. Orthoperus perpudllus. 



Sericoderus nimutus, sp. n. 



Sacium instabile, sp. n. 



L. c. 1-50 mm. Oblongo-ovale, convexum, iiitidulum, minute ct 

 confortim punotatum, pilis aureis dense vcstitum, castaneuni, 

 fasciis duabus tlavis uiuhilatis, aut maculis quatuor sat rotun- 

 datis, in elytris notatum ; antennis obscure, pedibus loetc flavis. 



This very distinct and pretty species was found by 

 Mr. Smith rather plentifully in the island of Grenada. 



Artlirolips intwtabilis, sp. n, 



L. c. 0-90 mm. Oblougo-ovalis, fuscus, brevitcr pubesccus, con- 

 voxus, minute ct coiit'ertissirae puuctatus; prouoto ma"-uo ; an- 

 teiniis pcrbrevibus iitquo pedibus lieto liavis. 



