142 FAUNA HAWAIIENSIS 



(j) Di'yophthorus homoeorhynchus, sp. nov. 



Niger, vel piceus, haud robustus, rugoso-punctatus. Rostrum utriusque sexus 

 (apice extremo excepto), opacum, rugoso-punctatum. Pronotum densissime rugoso- 

 punctatum, antice fortissime constrictum. Elytra sat profunde sulcata, sulcis grosse 

 punctatis, interstitiis punctulatis, punctis setas brevissimas pallidas, satis conspicuas, 

 ferentibus. Long, (rostr. incl.) 4"5 — 6 mm. (Plate VII. fig. 17; fig. 17a, head and 

 rostrum of ?; fig. 17^ of ^.) 



This species, although the elevated apical margin appears rather continuous with 

 the sixth than the fourth interstice of the elytra, evidently belongs to the group of 

 D. declivis, from which it is also separated at once by the fact that there is little 

 difference in the elevation of the interstices, whereas in that species the second, fourth 

 and sixth are very noticeably more elevated than the others. From those species 

 of the group of D. squalidus which it somewhat resembles, the female is distinguished 

 at once by the dull apical half of the rostrum, with its rugose puncturation, and the ^ by 

 the more outstanding pterygia, so that the rostrum is more widened about the point of 

 insertion of the antennae. The sexes are easily known by the more slender rostrum of 

 the female. 



Hab. Kauai mountains (2000 — 4000 ft.). 



(8) Dryophthorus declivis Sharp. 



Dryoplithot'iis dcclii>is Sharp, Tr. Ent. Soc. London, 1878, p. 23. 

 (Plate VII. fig. 18.) 



This is a very distinct species easily known by the costate 2nd, 4th and 6th 

 interstices of the elytra, the two latter uniting to form the strongly raised apical side- 

 margin. These interstices vary somewhat in the amount of elevation, but it is always 

 very apparent. The female has the rostrum more slender than the ^, less widened at 

 the insertion of the antennae, but the dull surface and rugose puncturation to near the 

 apex is common to both sexes. 



Hab. Oahu, Molokai, Hawaii. Not so common as many of the species. 



(9) DryophtJiorus modestiis Sharp. 



DryophtJioi-us nwdestus Sharp, Tr. Ent. Soc. London, 1878, p. 23. 



The sexual distinctions in this species are similar to those exhibited by the sexes 

 in D. homoeorliynchtLs and D. declivis. It varies considerably in size and the elevation 

 of the apical margin, the connection between which and the fourth interstice is rather 

 less manifest in some examples than others. 



Hab. Oahu, Maui, and Hawaii. 



