OCHYROCERA.—MYRMECOTYPUS. 123 
especially of the first, are much stronger than the rest, and the femora are rather curved and clavate, the 
lower extremities being gradually incrassated to at least double the thickness of the anterior portion. 
The tarsi end with two claws issuing from a small and distinct claw-joint; they are of a dull olive- 
greenish colour, a small portion at the extremities being yellowish. The greater part of the genue is 
black, and there is also a small part of the extremity of the other joints approaching to black, giving the 
legs a somewhat annulated appearance at those joints. The metatarsi and tarsi are yellow-brownish, the 
end of the latter paler. 
The palpi are short, similar to the legs in colour. The cubital joint is very short, with a long, strongish, 
tapering bristle at its fore extremity above; the radial joint is long and strong, and rather of a tumid 
form, furnished with strongish bristles or bristly hairs. The digital joint is long, about equal to the 
radial in length, distinctly curved, and tapers to a sharp spine-like point at its extremity; it is furnished 
with numerous long bristly hairs, chiefly along the inner side; rather beneath, on the inner side, is a strong 
lobe or prominence, to which, underneath, is attached the palpal bulb, the latter of an oval form at its 
base, with its extremity produced into a very long, tapering, sharp-pointed, corneous process. 
The falces are moderate in length and strength, straight, but considerably porrected, and similar to the legs in 
colour. On the underside of the oblique extremity of each falx is a tooth-like ridge, followed to the end 
of the falx by a row of three closely-set minute teeth. 
The mazille are long, strong, especially near their hase, straight, rather rounded, pointed at their extremity, 
and considerably inclined to the labium; their colour is like that of the falces. 
The lJabiwm is slightly suffused with blackish, of abnormal size, its base extending to the whole width of the 
sternum, and of an equilateral triangular shape, its apex obtusely pointed; it is similar in colour to the 
maxille, which, instead of being placed in the normal position, i. ¢. close to the sternum, on each side of 
the base of the labium, appear to issue from it some little way up on each side. Behind the labium the 
tongue is visible like an inner labium, it being obtuse at the end; it reaches nearly to the extremity of 
the maxille, and is tipped with a group of brown papilliform projections. On the inside of the maxilla is 
(apparently) a membranous enlargement, which I have not noticed before in any other spider. 
The sternum is short, heart-shaped, of a blackish hue, with a greenish longitudinal central stripe and greenish 
spots on the margins. 
The abdomen is elongate oval, or somewhat subcylindrical in shape, joined to the thorax by a short distinct 
pedicle. Its colour is black, with a longitudinal central bluish-sea-green stripe, and several oblique stripes 
of the same colour on each side, the anterior being the longest and strongest, reaching nearly to the 
spinners; the underside has two similarly coloured spots about the middle in a transverse line. The 
spinners are short, the outer four about equal in length, black, with a spot on the outer side at the base, 
and the tip greenish white. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
This curious spider appears to belong to M. Simon’s recently characterized genus 
Ochyrocera, based on two species discovered in the Island of St. Vincent; but no 
notice is taken in the generic diagnosis (/.c.) of the unusual characters furnished by 
the maxille and labium. 
MYRMECOTYPUS, gen. nov. (Drasside). 
Cephalothorax oblong-oval, broadest and truncated in front. Lateral marginal indentation at the caput slight. 
Caput marked off from the thorax by a continuous and tolerably strong constriction. Thorax very tumid 
or gibbous on the upperside behind; hinder slope short, abrupt, its profile line slightly incurved. The 
posterior end of the thorax drawn out in a sheath-like form to receive the pedicle connecting it with the 
abdomen. 
Eyes unequal in size, and forming a large crescent ; they are placed in two slightly curved rows, the curve of the 
anterior row directed forwards, that of the posterior backwards, though this latter row is the longest and 
nearly straight. The fore-central pair are the largest, the rest subequal, the hind-centrals rather the 
Rf 2 
