506 



more or less broken line, of pale tomentum runs towards the side of 

 the elytra behind the shoulders, defining more clearly one side of the 

 triangles, which is in reality a feeble ridge, formed where the lateral 

 compression meets the basal part of the wing cases. The second and 

 third striae (the first being as usual abbreviate) unite at the apex, 

 the fourth and fifth do so also, but do not extend so far back as tho 

 inner ones. In lateral view of the elytra the punctures in the outer 

 striae are easily seen. Length 5.5 mm. 



Hab. — Hawaii, Kealakekua, 3500 ft. (Timberlake). One on 

 Clennontia cacritlca and one on Byronia sandwicensis. 



Holcobius hawaiiensis Perkins. 



This species was originally described from a single example 

 taken in the stem of a tree fern in Kona, Hawaii, and in the 

 "Fauna" I referred to it others, taken later at Kilauea, also on 

 tree ferns. The Kona example is smaller than the others and 

 has dark antennae, but in the allied Maui species these organs 

 showed some variation in color (Fauna Hawaiiensis HI, 583). 

 Mr. Giffard has taken five examples in his house at light, close 

 to the spot where I found it near Kilatiea. These agree well 

 with mine and differ from the allied H. haleakalac in Leing 

 evidentl.v more robust and in the point of sculpture mentioned 

 in the description of the original example from Kona. The 

 length of the Kilauea specimens averages 9 mm., and this form 

 may be called var. viilcanns. These large species of Holcobius 

 seem to be almost entirely nocturnal and difficult to collect bv 

 day. By night those which have burrows in dead trees come 

 out and sit on the bark, and may be found paired in some 

 numbers, as I experienced in a thick forest on Haleakala. 

 The dead trees that they frequented, mostly Ohia lehua, were 

 unfortunately a considerable distance from my tent and I found 

 such difficulty in regaining this by the light of a lantern that I 

 had to give up this method of collecting the beetles. Holcobius 

 aMfiis, granulatns and glabricollis as well as hawaiiensis have 

 all been taken attracted by light. 



