50 THE VOYAGE OF H.M.S. CHALLENGEK. 



bably occurs all the year round. The larva resembles the adult, with the exception of the 

 differences to be noted in the description of the metamorphoses. 



7. Halohates genua luiti, n. sp. (PL I. fig. (3). 



Long oval ( ,? ) or shortly ovate ( ? ), widest behind the middle. Dark ashy grey paler 

 on the sides {S ), or silvery ashy grey ( $ ). Head with an obscure transverse rufous 

 yellow mark on each side at the hind margin. Antennas and legs fuscous lilack above, 

 dark fuscous brown lielow, clothed sparsely with grey pubescence. Base of antenna} nar- 

 rowly rufous ochreous. Front legs with coxse, trochanters more especially on inner side, and 

 base of femora below ; middle legs with a spot on the acetabula below (broader and more 

 distinct in the female) trochanters, and base of femora below^ ; hind legs with trochanters 

 and base of femora, more or less indistinctly fuscous ochreous brown. Abdomen with 

 hind margins of ventral segments fuscous ochreous. Genital segments : first below on 

 disk and posteriorly, second above, and apex of third above, fuscous Ijrown ; second l:)elow, 

 especially at apex of horns, and most of third below, fuscous rufous brown. Antennee : 

 third joint shorter and fourth joint longer than the second. Front tarsus : first joint rather 

 more than half the length of second. Middle tarsus : first joint about five times as long 

 as second. 



$ . Length 3 '5, breadth 2, middle femur 4, hind femur (?) mm. 

 $ , Length 3, Itreadtli 2"2.), middle femur 4, hind femur 3 mm. 



Hahitat. — North Pacific Ocean and Celebes Sea (Challenger) ; China Sea (Giglioli). 



^ . Long oval, widest behind the middle. Dark ashy grey, paler on the sides. 

 Antennas and legs fuscous black above, dark fuscous brown below, more or less sparsely 

 clothed with grey pubescence. Eostrum with the apical three-fourths shining black. 

 Eyes dark brown. Antennae at the extreme base rufous ochreous. Head with an ill- 

 defined transverse rufous yellow mark on each side near the hind margin. Front legs 

 with the coxie, trochanters (more especially on the inner side) and base of femora ; middle 

 legs with a blotch on under side of acetabula, trochanters, and femora at base below ; 

 hind legs with trochanters and base of femora, more or less indistinctly fuscous ochreous 

 l)rown. Abdomen with the hind margins of the ventral segments fuscous ochreous. 

 Genital segments with the second above and apex of the third above, as well as the 

 disk and hinder part of the first below, fuscous brown ; the second below, especially at 

 the tips of the horns, and the third beloA\', especially towards the l)a,se, fuscous rufous 

 brown. 



Head with hind margin slightly elevated on each side of the middle, the elevation 

 neither reaching the middle uor the eyes. Antennm (PI. L fig. G, a.) more tliau half 



