80 



in koebelei. The apical portion of the median lobe of the 

 aedeagns (Fig. '^>) is not so prolonged, and this would seem 

 to point to a really distinct species. Waimano Mountains. 

 Labelled R. 6. 



Rhyncogonus sordidus Perkins. 



I refer a small series of specimens in the Giifard collection 

 from the Island of Lanai to this species, and Avith much don])t 

 two from Oahu. In the specimens examined from Lanai the 

 apical portion of the median lobe is broad, comparatively short, 

 and with very slightly curved upwards tip. I think the Oahu 

 form has a still shorter apex of the median lobe, and a bettei- 

 series might show it to be distinct. 

 Rhyncogonus sp. n. (?) near R. stygius. 



Three specimens (1 male, 2 females) from Freycinetia, 

 Wahiawa, Oahu, are probably yet another new species. It i? 

 a large form, perhaps a little smaller than hlackhurni, with 

 rostrum rather longer, and the snout less dilated, the eyes less 

 prominent. The aedeagus of a specimen labelled R. 4 suggests 

 a close relationship with blachburni. 



My examination of the male organs, inadequate as it is, 

 shows that the male copulatory apparatus is of a sim])le nature, 

 very common in Otiorhynchidae, and that different species in 

 this genus exhibit only slight distinctions. In fact this seems 

 to support the theory that all the species may have arisen in 

 the Islands from a single species. A careful examination of 

 numerous specimens with a view to ascertaining the constancy 

 or variation of this organ is eminently desirable. 



In his review of the genus in the Introduction to the Fauna 

 Ilawaiiensis, Dr. Perkins enumerated 24 species of Rhynco- 

 fjonus, and mentions that none is known to occur on Hawaii. 

 Mr. Giffard has, however, found a species there, of which de- 

 scription follows: 



Rhyncogonus giffardi sp. n. 



Fusco-niger, parce griseo-squamons, antennarum funiculo tibiusque 

 subflavescentibus, elytris convexis ad latera minus discrete carinatis ; ocu- 

 lis mediocriter convexis. Long. inc. rostr. 8 mm. 



Hab. Insula Hawaii. 



