112 Mr. David Sharp on the 



elevato instructo ; antennis articulo 8°, 7° quadruple lon- 

 giore, 3°, 4° evidenter longlore. 



This species (so far as knowledge of the male will jus- 

 tify me in speaking) strongly resembles C. armatus ; the 

 pectoral processes are, however, less strongly developed, 

 and the structure of the antenure very different ; the 2nd 

 joint is very short, the 3rd also very short, but more 

 slender than 2nd, it differs but little from the 4th; joints 

 4 — 7 are small and differ but little from one another ; the 

 8th joint nearly as long as the four preceding ones ta- 

 gether, 9th very nearly as long as and slightly stouter than 

 the 8th ; 10th just about as long as, but distinctly stouter, 

 than 8tli ; 1 1th joint distinctly longer and stouter than 10th. 



A single specimen. Fukuhora, Nagasaki. 



Mr. Lewis has also brought back a female Ctenistes, 

 which I think may prove to be the female of C. medius. 

 It greatly resembles the insect which I suppose may be 

 the female of C. armatus. It has, however, the antenna? 

 markedly shorter than the C. armatus (?) $ ; the propor- 

 tions of the joints to one another, however, being much 

 about the same as in that insect, except that the 8th is 

 strikingly shorter, so that its development is not so dis- 

 proportionate to that of the contiguous joints as it is in 

 C. armatus (?) $. 



8. Ctenistes similis. Rufescens, nitidus. Long. 1 lin. 

 Mas, metasterno medio utrinque tuberculo angulato, 



elevato, instructo ; antennis articulo 8°, 7° triplo longiore, 

 articido 3°, 4° duplo longiore. 



This species differs apparently from C. medius only by 

 the greater elongation of the intermediate (3 — 7) joints 

 of the antenna? ; the 3rd joint is quite twice as long as 

 the 4th ; and the 7th is not quite so short in proportion 

 to the 8th, as is the case in C. medius. Whether these 

 points are more than individual variations, I must leave 

 till the arrival of more sufficient materials to determine. 



Nagasaki ; a single specimen. 



There is yet another individual of Ctenistes among ]Mr. 

 Lewis's material, but as there is only a single j specimen. 

 I shall not allude to it further than to say that I am very 

 doubtful whether it can be referred to either of the above 

 described species; it is from Nagasaki. 



9. Batrisus optatus, n. sp. Brevior, rufo-castaneus, 

 nitidus, antennis minus validioribus, prothorace cordato," 



