COLEOPTERA 1 1 1 



(21) Plagithmysiis pidvillatus Karsch. 



Clytarlus pnhillatus Karsch, Berlin, ent. Zeit. xxv. 1881, p. 9, PI. I. f. 14. 



Hab. Maui ; " Grove Ranche," Karsch ; Haleakala, 5000 ft., Perkins. We have 

 received only three individuals, and the species was described by Karsch on one female. 

 It is one of the least attractive species, being remarkable for its uniform colour and 

 freedom from definite ornamentation as well as for the very dense sculpture of the 

 elytra. The species is probably verging on extinction owing to the destruction in this 

 locality of the forest tree it inhabited. Insects are no longer to be found at Grove 

 Ranche ; but Mr Perkins procured his examples about 2000 ft. directly above its 

 situation, on Metrosideros polymorpha. 



{22) Plagithmysus blackburni Sharp. 



Clytarlus blackbui'iii ShsiV^, Tr. Dublin Soc. (2) in. 18S5, p. 195, PI. V. f 47. 



Plagithmysus blackburni 'i\\'AX^, Ent. Mo. Mag. 1896, p. 271. 



Hab. Hawaii; found by Mr Blackburn [on " Acacia falcata'''] on Mauna Loa 

 in May ; by Mr Perkins at Kona in the autumn, on Sophora chrysophylla. The only 

 variation that occurs in the colour of the legs is the one that I have mentioned as being 

 so rare in P. varians. 



(23) Plagithmys7is sulphurcscens Sharp. 



Plagithmysus sulphurescens Sharp, Ent. Mo. Mag. xxxii. 1896, p. 271. 



(Plate VI. fig. 17; $.) 



Hab. Hawaii ; Kilauea, July 1895. The name of the tree to which this species 

 is attached is unfortunately not known. 



Since P. lamarckianus has been distinguished from P. varians, it should be 

 mentioned that P. sulphurescens is allied to the former more than to the second of 

 these species. 



(24) Plagithmysus speculifer Sharp. 



Plagithmysus speculifer Sharp, t. c. p. 272. 



Hab. Maui; head of the Jao Valley, June I S94. Unique. Food-tree unknown. 



(25) Plagithmysus aestivus Sharp. 



Plagithmysus aestivus Sharp, t. c. p. 272. 



Hab. Molokai; in June and August, Perkins. On Metrosideros polymorpha. 



