EURYPELMA.—DAVUS. 9] 
pyriform bulb, of a rich black-brown colour; the stem (or anterior portion) enlarging into a flattish, 
somewhat oval form, whose rounded obtuse extremity has a semitransparent red rim. 
The falces are Jong, strong, roundly arched in profile, and densely clothed with foxy-red hairs and bristles, 
mixed with a few of a browner hue. The fang is long, strong, curved, and black. The cephalothorax 
is oval in form, narrowed and truncated at the caput, and longer than broad. The relative length of the 
legs. which are robust and rather long, is 4, 1, 2, 3, but the actual difference in length is not great. 
The maville are long, straight, divergent, with a prominent angular point on the inner side of the anterior 
extremity ; they are of a red-brown colour, their inner margin being clothed with a strong fringe of red 
bristly hairs, as also are the undersides of the falces. The ludiwm is almost quadrate, but rather broader 
at the base than at the apex, which is truncated. 
The sternum is small, oblong-oval, about double as long as broad, and (with the basal joints of all the legs) 
densely clothed with deep brown pubescence, mixed with longer, blackish, bristly hairs. The spinners are 
four in number, the superior pair the longest, moderately long and upturned (these parts were injured 
by the opening and stuffing, for preservation, of the abdomen, so that their exact length and joints 
cannot be accurately seen). 
Hab. Costa Rica (Rogers). 
DAVUS, gen. nov. 
Cephalothorax as broad as long, narrow and truncate at the caput, very broad behind. Caput scarcely raised 
above the thorax ; thoracic indentation roundish, but not particularly strong or conspicuous. 
Eyes on a distinct oval eye-eminence ; a line drawn across close below the central pair would just pass between 
them and the fore laterals, which are larger than the centrals, the hind lateral and hind central eye on 
its side (which last is the smallest and of irregular shape) are almost or quite contiguous to each other. 
Legs short, very robust, without spines, or, if any, a very few fine ones beneath the metatarsi; they are much 
injured in the single specimen obtained, but judging by the femora, which are all entire, their relative 
length is 4, 1, 2, 3, though the actual difference is small; beneath the tarsi and a small portion of the 
metatarsi of those legs which are tolerably perfect is a scopula. 
Falces strong, prominent, somewhat abruptly bent (in a rounded form) in profile. 
Mawille long, straight, divergent, and with a very small prominent point at the extremity on the inner side. 
Labium longer than broad, of a somewhat oblong form. 
Sternum of moderate size, oval, broadest behind, and hollow-truncate in front. 
Abdomen small, oval. Spinners 4. Superior pair as long as the tarsi of the second pair of legs. 
The nearest allies of the spider for which this new genus is proposed are Lurypelma, 
C. Koch (Auss.), Zasiodora, C. Koch, Lasiocnemus, Auss., and Homeomma, Auss. 
Davus fasciatus, sp. n. | 
Adult male, length 74 lines, to end of falees &} lines; length and breadth of cephalothorax 43 lines. 
The cephalothoraa above and below, the legs, falces, and palpi are dark brown, the cephalothorax clothed with 
dull yellowish-brown pubescence and hairs. The eye-eminence has some long bristly hairs in front and 
behind, meeting over the middle. The abdomen is densely clothed with hairs and pubescence, banded 
with distinct alternate lateral bands of black-brown and foxy-red (whether the bands traverse the upper- 
side or join into a longitudinal central band cannot be distinctly seen); there are also numerous long 
bristly hairs of a foxy-reddish colour on its upper surface. 
The two central and fore lateral eyes form a straight row (looked at from above and a little behind) over the 
anterior side of the eye-eminence. The hind lateral eye on each side is contiguous to the hind central eye ; 
the latter is smallest and both are of irregular form and bright red colour. The interval between those 
of the hind central pair is a diameter, and is greater than that between each and the fore lateral eye next 
toit. The hind central eyes are also almost contiguous to the fore laterals ; in fact the eyes form two 
groups, the eyes of which are exceedingly close together, some being quite contiguous. 
The palpi are tolerably long and strong; the radial exceeds the cubital joint in length and strength, Digital 
Nf 2 
