632 H. E. ANDREWES 
13. Wariopalpus crusoei Reed Proc. Zool. Soc. Lond. 1874, pp. 50 
and 69. 
Masatierra, 6 ex., found under stones, 5. IV. 1917. Confined to this 
island. 
The specimens described by REED were also found under stones at 1000 
feet above sea level. 
Descriptions of new forms. 
Trechisibus femoralis Germain var. dackstrom7 var. nov. 
Examples taken on Masafuera differ in some respects from the typical 
form, but as they agree with it in most of their characters, and as the species 
shows considerable variability, I treat it as a variety. The four specimens 
before me vary somewhat in colour among themselves, and in one example 
not only is the ferruginous colour on the elytra almost absent, except in the 
marginal channel, but the striae are very lightly impressed. 
Hflead with flatter eyes, and with the part of the frontal foveae curving 
round on each side behind them much less impressed. /Pvothorax narrower, 
with the hind angles blunter and hardly projecting laterally, the reflexed lateral 
margins not more than half as wide. Z/y¢ra with deeper striae, and, as in the 
case of the prothorax, a much more widely reflexed lateral border. The 
microsculpture is similar, that is to say with meshes averaging twice as wide 
as long on the elytra, isodiametric on the head and prothorax. 
Masafuera, 4 ex., found under stones at 1300 metres above sea level, 
27 AL OlZ. 
On one of the cards two specimens were mounted, one of which, the 
fifth example of the Masafuera series, was upside down, and, on being dismounted, 
proved to belong to the typical form. As there were blanks elsewhere in the 
Masatierra series, showing gum but no insect, I think it probable that this 
specimen became detached and by inadvertence was remounted on a card with 
the Masafuera label. 
Trachysarus sericeus sp. n. — Fig. I. 
Length: 7—8,5 mm.- Width: 2,2—2,6 mm. 
Piceous black, elytra sericeous; palpi, antennae, borders of prothorax and 
elytra, apex of elytra, pro- and epipleura, apex of venter, and legs more or 
less ferruginous. 
Head massive, convex, smooth, and shiny, frontal foveae uneven, in the 
form of an inverted W, the outer lines deep, running to the margins of eyes, 
the inner ones shallower, meeting on middle of front, eyes flat, antennae some- 
what dilated at apex, extending well beyond base of prothorax, tooth of 
mentum obtuse and a little rounded. /rothorax rather flat, barely wider than 
head, about a sixth wider than long, base a little narrower than apex, sides 
very narrowly bordered, gently rounded in front and equally faintly sinuate 
behind, a seta at a fifth from apex, hind angles slightly obtuse and rounded; 
transverse impressions distant from margins, front one wide and deep, hind 
