52 THE VOYAGE OF H.M.S. CHALLENGER. 



which is only two-jointed, the first joint very small and almost ring-like, the second about 

 as long as the normal fourth joint. 



8. Halohates hayanus, n. sp. (PI. 1. fig. 8). 



Oval, widest aljout { t ) ov behind { $ ) the middle. Silvery grey above, paler on the 

 sides, and silvery white below. Antennae and legs blackish, with grey pubescence. Head 

 with an ol)liqne, wedge-shaped, reddish-yellow sjjot on each side between the eyes, the 

 .sjjots meeting by their narrower ends at the middle of the hind margin. 



^ . Antennas at the base, prosternum (except the sides), front legs with coxae and tro- 

 chanters, a spot at base and a smaller spot at apex of front femora ; middle and hind legs 

 with under side of coxaj and trochanters, sternum with a somewhat obsolete longitu- 

 dinal j)osterior central line, a large triangular blotch on the under side of the middle 

 acetabula, a large spot on the outer side of all the acetabula, third genital segment above 

 with the mai-gins, as well as the abdomen and genital segments below, more or less 

 yellowish ochreous. Second genital segment aliove reddish-bi'own, tips of the horns 

 blackish-brown. Antennae : third joint about four-fifths the length of the second, 

 fourth joint subequal in length to the second. Front tarsus : fii'st joint al)out one-half 

 the length of the second. Middle tarsus : first joint quite three times the length of the 

 second. 



? . Similar in eolour to the male, but front femora with a yellow-ochreous band above 

 from base to near apex, and another more distinct one on the inner under side. Under 

 side of the body mostly yellowish ochreous, sides of the head, and sides of the sternum, 

 especially anteriorly and on the front margin of the mesosternum, fuscous brown. 



^ . Length 3'5, brcadtli 1'5, middle femur 4, hind femur 3"5 mm. 



? . Length 3'5, breadth 2"25, middle femur 4'5, hind femur 3'5 miu. 



Ilahitat. — Red Sea, near Aden (Dr. George Hay). 



,? . Oval, widest l)ehind the middle. Silvery grey above, more silvery on the sides, 

 and silvery white Ijelow. Antennae and legs fuscous black, with grey pubescence. Head 

 with two oblique transverse, wedge-shaped reddish-yellow spots, which meet by their 

 narrow ends at the middle of the hind margin. Sides of the head with longer silvery 

 white pubescence. Jointlet between the second and third joints of the antennas reddish- 

 yellow. Antenna) with the base ; prosternum except the sides ; front legs with the coxas 

 and trochanters, and a s]iot at base and a smaller spot at apex of femora ; middle and hind 

 legs with under sidcS of coxae and trochanters ; .mesosternum with a rather obsolete 

 posterior central longitudinal line, and a large triangular blotch reaching from the apex 

 of the middle acetabula ncirly half-way to the fmnt margin of the mesosternum ; all the 



