298 ME. G. LEWIS ON JAPAN 



joints of the tarsus, are brought into play, while the femora are 

 kept almost stationary, and Cyphagogus is enabled to enter, pass 

 freely through, and explore the confined recesses of galleries 

 made in hard wood by borers of no bigger girth, but of more 

 perfect cylindricity, than themselves. Yet, on account of their 

 elongate limbs, one might suppose, without the evidence of 

 direct observation, that such a feat were impossible. The first 

 and second pair of tibiae are longer in proportion to the tarsi 

 than the hind pair ; and an examination of the insect and a 

 reference to their habits will reveal the necessity of this structure. 

 Look at Galodromus MelJgi, Gruer., figured by Westwood in the 

 ' Cabinet of Oriental Entomology,' and see what happens in an 

 insect of these habits when the tibiae are long. When in the 

 confined galleries of wood-borers, the hind tibiae of Calodromus 

 cannot serve as the means of locomotion, and their apparent use 

 seems to be to act as a mere receptacle for surplus tissue. Even 

 when shifting its quarters, the long, flattened- out, eccentrically 

 formed tibiae cannot assist its movements. Owing to a knowledge 

 of these habits of Cyphagogus, I took three species afterwards in 

 Ceylon : one is very remarkable as being of a pale testaceous 

 colour. The legs of this and Zemioses are delineated to show 

 their singular form ; but no drawings could be adequate for the 

 purpose of showing their position in the trees. 



3. JoNTHOcEETJS NiGEiPES, u. sp, (Plate XII. fig. 5, J J 6, $ .) 



Eufus, subnitidus, subdepressus, antennis pedibusque nigro- 

 piceis illis nigro-pilosis ; elytris striatis, secundo, tertio quartoque 

 suturali longitudinaliter depressis ; subtus obscurus. 



Eed, smooth, and rather shining ; rostrum, head, and thorax 

 with a median furrow ; antennae and legs nearly black, former 

 clothed with black hairs. Elytra striate, 2nd, 3rd, 4th depressed ; 

 interstices obscurely punctate. Beneath, its colour is nearly as 

 dark as the legs. Length 3-4 lines. 



S . Antennae slender, nearly as long as the body ; eyes full, and 

 nearly touching in front. 



5 . Antennae robust, a little longer than the head and thorax ; 

 eyes moderate, and not encroaching on the region of the head as 

 in the male. 



This species lives under bark in the same way as Brontes and 

 JDendrophagus ; the legs when at rest are kept close to the 

 body, and the antennae are stretched out in front and lie in a 



