EXPEDITION TO SOKOTRA : NEW SPECIES. 11 
sat dense granuloso; elytris tuberculis carinisque viridibus instructis ; 
corpore subtus pedibusque viridi-eneis, femoribus subtus in medio metasterni- 
que lateribus testaceis. ¢. Processu prosterni sat breve, ad apicem anguste 
emarginata, femoribus anticis ultra medium longe mucronatis ; coxis inter- 
mediis utrisque bispinosis. Long. 12}, lat. 7 mm. 
Habitat. Sokotra : Dahamis (alt. 350-1000 ft., XII. 98). 
(11) Oryctes vicinus. 
O. monoceroti (Oliv.) affinis sed minor et pronoto elytrisque relative latioribus 
et brevioribus. Long. 32, lat. 15 mm. : 
Habitat. Sokotra: Hadibu Plain, XII. 98. One male example of this 
species was obtained. 
This example is about equal in size to small males of Oryctes boas, Fab., and 
in general form somewhat resembles the latter species ; but in structure and 
in sculpture it seems to be more nearly allied to 0. monoceros, Oliv. The 
clypeus is bidentate, with the emargination between the teeth rather deep, 
and lined with reddish-tawny hairs; the cephalic horn in size and shape 
resembles that of 0. monocvros; the prothorax is relatively wider than in 
C. monoceros, and the disk somewhat more excavate anteriorly ; the elytra are 
shorter and broader in proportion, the sides more rounded, and the punctura- 
tion a little stronger and less dense, than in 0. monoceros ; the propygidium 
is very finely striate transversely over the median area, the striae appearing 
to be more regular and continuous than in 0. monoceros. 
Elateridez. 
(12) Alaus sulcicollis. 
Piceus, supra albo-tomentosus, subtus (pectore medio albescente excepto) 
fulvo-brunneis ; capite supra fulvo-brunneis; pronoto albescente, quoque 
maculis fulvis vel fuscis notato, medio longitudinaliter sat late suleato, sulco 
paullo ante medium evanescente, et postice fere ad basin prolongato ; elytris 
albo-tomentosis basi fulvo-brunneo dense variegatis, utrisque prope medium 
maculis fuscis notatis, apice truncatis extus rotundatis et ad suturam breviter 
mucronatis. 
3 minor, elytris fusco-lineatis. ¢ Long. 21, lat. 6} mm; ? Long. 28, 
lat. 9$ mm. 
Habitat. Sokotra : Hadibu Plain, 10-15. XII. 98, ¢ and @ ; Homhil, E. 
Sokotra (alt. 1500-3000 ft., 17-24. VI. 99). 9. 
Covered above with a dense scaly pubescence which is for the most part 
whitish in colour, but on the head and the basal declivity of the elytra is of 
a dingy fulvous or brownish tint interspersed with small whitish patches ; the 
pubescence on the underside is fulvous-brown, except over the middle of the 
metasternum where it has a whitish colour; the pronotum is sometimes 
marked with a few fulvous or brownish patches, and each of the elytra 
presents one or two oblong fuscous spots near the middle, and a few dark 
patches along the outer margin. Prothorax with each side slightly rounded 
anteriorly, and rather strongly sinuate posteriorly, the disk with a median 
groove extending from a little before the middle almost up to the base. The 
latter character distinguishes this species from all others belonging to the 
genus ; for although there is a median groove present on the pronotum in 
A. excavatus, Fab., the groove is abruptly limited behind by a triangular ridge 
or tubercle interposed between it and the median lobe of the basal margin. 
In the present species there is no such ridge, and the median groove extends 
downwards behind to the slightly arched middle lobe of the base. 
