81 



The ouly specimen is in bad condition, but is certainly a 

 distinct species, and as the genus has been hitherto unrepre- 

 sented in the Island of Hawaii, it is well to name this species, 

 and it is due to its discoverer, W. M. Giffard, that his name 

 should be associated with it. 



EXPLA^'ATION OF FIGURES. 



Fig. 1. Median lobe, Rhyncogonus blacl-hurni, internal sac 

 extended. 



Fig. 2. Tegnnen, B. hJacl'hurni , dissected off the median 

 lobe, which it encircles. 



Fig. 3. Median lobe of R. Tcoebelei, sac not extended. 



Fig. 4. Transfer-apparatus of Rhyncogonus sp. near hoe- 

 belei. 



Lettering is uniformly as follows: — ^b. bridge of tegmen; 

 d. duct ; f . fork of tegmen ; f . o. functional orifice ; h. a. hinge- 

 apparatus; i. s. internal sac (usually quite hidden) ; s. a. supe- 

 rior appendage of tegmen; t. a. transfer apparatus; t. s. teg- 

 minal strut. 



In facies intermediate between R. vestitus and R. simplex, 

 and may be placed near the latter, from which it is distin- 

 g-uished by the denser pubescense and by the elytra markedly 

 acuminate at the apices. Eyes about as convex as in simplex. 

 Thorax densely punctate with a smooth space along the middle 

 near the front, the pallid pubescense forming a rather large 

 patch at the sides behind, elsewhere scanty. Elytra with more 



