COLEOPTERA 649 



from P. co/laris. The male only is known ; it has the front tarsi a good deal dilated, 

 the middle tarsi clothed with white hairs along the inner edge. The hind tibiae are 

 very hirsute with erect tawny hairs. The abdomen has a band of white hairs on each 

 side. The mesothoracic and metathoracic epimera are densely clothed with ochreous 

 scales. Three specimens. 



The type specimen of the species is rendered additionally interesting as beino- an 

 exponent of a form of monstrosity that has, I believe, not before been observed. To 

 the second joint of the left anterior foot there is attached — in addition to the ordinary 

 terminal joints — a supernumerary termination of the tarsus, consisting of two joints 

 placed dorsum to dorsum, and so closely amalgamated that they look like a single 

 segment clothed on its two exposed aspects with hairs normal to an under surface of 

 the foot. This supernumerary appendage is terminated by a short, thick, claw-joint 

 ending in a single small claw. The true foot is a little shorter than is natural. 



This superadditional fourth joint is not lobed, and it may be the case that it is not 

 two joints, but only one bilobed joint folded. 



Hab. Hawaii. North Kona, 1900 (Perkins). D. S. 



Callithmysus viicrogaster Sharp. 



Callit/wiysus microgaster, huj. op. 11., p. 113. 



Two additional specimens have now been found of this very rare insect. They 

 are small, being only 10 mm. long, and the clothing of the hind tibiae is much shorter 

 than in the typical form. 



Only six individuals are known of C. microgaster. They come, I believe, from three 

 different spots on Oahu, and seem to indicate the probable existence of local races. 



Hab. Oahu, N.W. Koolau range, April 1901, two specimens (Perkins). 



(i) Callithmystis koebelei Perkins. 



Callithmysus koe be lei Perkins, Proc. Hawaiian Ent. Soc. i., p. 210. 



Ferrugineus, prothorace dorso plaga magna, rufo-ferruginea, pubescentia albida 

 delimitata ; elytris dense punctatis, singulo posterius ad suturam linea angusta pubes- 

 centiae albae, lineis his mox ante medium valde divergentibus ; tibiis posterioribus 

 dense hirsutis, ad basin pubescentia albida; tarsis posterioribus albido-hirsutis; femoribus 

 subtus plus minusve infuscatis, ad basin testaceis. Long. 8 — 16 mm. 



This species resembles in coloration certain forms of Plagitlimystis — e.g. P. hishopi 

 and P. bilineatits — and it also lacks the dense black pubescence at the apex of the hind 

 femora that is so conspicuous in Callitlimysiis microgaster. But in the shape of these 

 femora it agrees with C. microgaster. It varies much in size, but not in other respects. 

 It is very difficult to distinguish the sexes. 



