FABATtTS. 155 



black, finely pilose, base of first joint pale ochraceous ; head with 

 the apical and lateral areas pale greyish, basal margin transversely 

 linearly ochraceous but centrally broken ; eyes castaneous brown, 

 their basal margins dull ochraceous ; pronotum with two discal 

 pale foveations, the upper margins of which, and a central more 

 or less connecting line, are black ; apical half of abdomen above 

 paler and more greyish in hue, the segmental margins darker ; 

 anal appendage blackish ; legs bluish, more or less greyishly pilose, 

 the anterior legs beneath ochraceously pilose, the acetabula, abdo- 

 men beneath, and anal appendage more or less ochraceous ; 

 structural characters as in generic diagnosis. 



Length, c? 5, $ 5 to 5| millim. 



Hob. Andaman Sea (Indian Marine Survey, Alcock). 



Genus FABATUS. 

 Fabatus, Dist. A. M. N. H. (8) v, p. 147 (1910). 



Type, F. servus, Dist. 



Distribution. Andaman Sea. 



Head large, declivous in front, subquadrate, obtusely apically 

 angulately produced a.nd also distinctly angulate on each side 

 above the insertion of the antennae; eyes of moderate size, 

 substylate, moderately emargitiate at interior margins, a little 

 projecting beyond the anterior margin of the pronotum ; antennas 

 with the first joint longest, a little shorter than the anterior tibiae, 

 third shortest, second and fourth subequal in length ; rostrum 

 short, robust, not passing anterior coxae ; pronotum shorter than 

 head, transverse, the lateral margins moderately rounded, posterior 

 margin a little concave ; mesonotum elongate, convex, slightly 

 more than twice the length of pronotum ; anterior legs slightly 

 thickened, more so in the male than in the female ; anterior tibiae 

 apically inwardly spinous and in the male with a strong, robust 

 spine near middle, in female unarmed ; intermediate and posterior 

 legs slender, intermediate considerably longer than the posterior; 

 the intermediate tibiae very strongly curved ; intermediate tarsi 

 much longer than the posterior tarsi. 



The only known species of this genus in general appearance some- 

 what resembles the marine species represented by ffalobates, but 

 differs by the ernarginate inner margins of the eyes ; it is, however, 

 a truly marine species and I retain it in the Halobatinaria. I have 

 as yet only seen undeveloped forms, collected by Lieut.-Col. Alcock 

 on the Indian Marine Survey. 



2929. Fabatus servus, Dist. A. M. N. H. (8) v, p. 147 (1910). 



Head ochraceous with a broad central longitudinal spot and 

 a linear longitudinal spot on each side, black, the base greyish 

 white, the apex blackish ; eyes ochraceous or brownish ochraceous ; 

 antennae castaneous brown, the base of first joint much paler, the 

 fourth joint darker ; pronotum greyish white, with a large 



