588 FAUNA HAWAIIENSIS 



(3) Xyletobius silvestrii, sp. nov. 



Rufescens, elongatus, subparallelus, plus minus infuscatus, antennarum articulis 

 duobus basalibus aut pluribus rufis, caeteris plus minus infuscatis, pallide tomentosus. 

 Antennae minus fortiter sive mediocriter elongatae, articulo septimo conspicue longiore 

 quam latiore, octavo fere bis longiore quam latiore, sequentibus fortiter elongatis. Pro- 

 notum perinaequale, juxta, sive paullo post medium, fortiter elevatum, tomento pallido 

 subvariegatim conspicue vestitum, angulis posterioribus lateralibus distinctis, quamvis 

 obtusis. Elytra fortius striata, stria secunda cum tertia sola ad apices confluente, inter- 

 stitiis subconvexis, pallide tomentosa, tomento baud laevigato, sed quasi maculas parvas 

 male definitas nitidiores formante. Long. 3*5 — 4*5 mm. 



This species cannot possibly be confused with any other. It is obviously allied to 

 X. walsinghainii, but differs in having the sides of the pronotum nearly straight in front 

 of the hind angles, instead of being conspicuously excised, and the angles themselves 

 consequently are less conspicuous. There are many other differences in detail of struc- 

 ture in addition to that of size. This insect seems to be rare, as I have seen only three 

 or four examples, including a pair taken in cop. 



Hab. Oahu ; 2000 ft. or somewhat less. 



(4) Xyletobius gj'iiiis/iaivi, sp. nov. 



Fusco-niger, fusco-brunneus aut brunneus, nonnunquam nigricans vitta lata flaves- 

 cente longitudinali ab humeris elytrorum extensa ornatus, antennarum articulis nonnullis 

 basalibus saepe rufescentibus, caeteris fuscis, pedibus fuscis aut rufescentibus, varia- 

 bilibus, sat angustus, parce pallide tomentosus. Antennae breviores, sat serratae, 

 articulo septimo minus elongato. Pronotum breve, latum, fortiter transversum, opacum, 

 obscure sculpturatum. Elytra conspicue impressa, striis sat sinuatis, parce tomentosa, 

 stria secunda cum tertia sola ad apices occurrente, ibique plerumque fortiter impressa. 

 Long. 3 mm. 



This species varies a good deal but is always. easily separable from any other by 

 the following characters. It is scantily tomentose or pubescent, has shortish antennae 

 in either sex (these not differing greatly), the pronotum seen in j^rofile has its upper 

 outline almost straight, hardly or not at all convex. The striation is as described 

 above, and the elytral impressions are always conspicuous. The Kauaian examples 

 tend to form a distinct species, characterized by lighter striation and more elongate 

 elytra. In many specimens these features are very strongly marked, but others are 

 identical with the Oahuan ones, and others are intermediate. The brown or dark 

 fuscous colour of the insect, save in exceptional specimens, is very characteristic. 



Hab. Kauai, Oahu. — -This Anobiid is more frequently met with than any other 

 in the immediate neighbourhood of Honolulu. A strongly striated example from this 

 range has served as the type of the species. 



