Coh'optera from the Hawaiian Islands. 89 



large and rather closely f;icetted. The thorax is trans- 

 verse, and emarginate hi front, its width is almost that of 

 the elytra, the sides are nearly sti'aight behind the middle, 

 and a good deal narrowed towards the front, the hind 

 angles are rectangular, the base and sides are very finely 

 margined. The scutellum is short and very broad. The 

 elytra have each three fine sti-ia?, which, viewed in a cer- 

 tain aspect, have the appearance of very fine elevated 

 lines. The whole of the upper surface is excessively in- 

 distinctly pimctured, and bears an extremely short, almost 

 invisible, ashy pubescence, which is no doubt very easily 

 abraded. 



This insect was sent by Mr. Blackburn as No. 20 ; it 

 is beaten from trees on the high mountains of Oahu, Maui, 

 and Kauai ; its extreme activity in leaping renders it diffi- 

 cult to capture. 



The hind legs are not dilated, and I believe the salta- 

 torial power must arise from the front legs, the anterior 

 tibire of which are rather longer than the others, a little 

 thickened towards the extremity and armed with a peculiar 

 stout spur. 



I subjoin the characters, so far as I have been able to 

 add them, of this most anomalous little beetle. 



Antennas 11 -jointed, with basal two rather long joints, 

 then six very slender, subequal intermediate joints, the 

 terminal three joints forming a very loosely articulated 

 slender club. Eyes large but not very prominent, en- 

 croaching greatly on the upper surface of the head. 

 Labrum large, distinct, transverse, rounded in front, 

 leaving exposed the points of the mandibles. Mandibles 

 rather large, wdth a large basal portion and a moderately 

 slender apical portion ; the latter bifid at the extremity. 

 MaxillfB with a rather large, pubescent outer lobe, and an 

 extremely slender, linear inner lobe ; their palpi stout, 

 ,3-jointed, the apical joint not at all dilated, three or four 

 times as long as broad, moderately acuminate, the basal 

 joint rather stouter than the others; the middle joint 

 about as long as broad. Labium not observed. Pro- 

 sterniim large, the coxfe placed at its hind part, very 

 widely distant fi-om one another, small but not globose, 

 having an extension in the anterior and outward direc- 

 tion, their cavities not closed behind. Mesosternum 

 broad and transverse, quite on the same plane as the 

 metasternum; middle cox;e minute, globose, very w-idely 

 separated. Hind coxje transverse, very Avidely separated. 



