ANYPHAENA.—STEMMOPS. 125 
shortest and nearly straight, the convexity of the curves directed away from each other. The interval 
between those of the hind-central pair is equal to a diameter, and is a little greater than that between 
each and the hind-lateral eye next to it. The eyes of the anterior row appear to be about equally 
separated from each other. 
The legs are tolerably long, 4, 1, 2, 3, or 1, 4, 2, 3, moderately strong, armed with a fair number of spines, 
except on the tarsal joints, some of the spines being rather long; beneath the two claws at the extremity 
of the tarsi is a small claw-tuft. In front of each of the coxe of the first pair is a strongish tooth-like 
prominence. 
The palpi of the male are moderately long and strong. They are similar in colour and armature to the legs. 
The humeral joint has three short, strongish, black spines at its fore extremity in a transverse line on the 
upperside, and a single one a little way behind them. The cubital joint has at its fore extremity on the 
upperside a small, roundish, shining red-brown tubercle. The radial is about equal in length to the 
cubital joint, and has at its outer extremity underneath (and from beneath a fringe of coarse hairs) a 
straight, rather strong, corneous apophysis pointed at the end, and with another but smaller projection at 
its base on the outer side. The digital joint is rather large, elongate-oval, and of a dark yellow-brown 
colour. ‘The palpal organs are well developed, not very prominent, nor very complex. 
The falces are straight, moderate in length and strength. 
The maaxille, labium, and sternum are normal in form. 
The abdomen is oval, pointed behind, of a pale dull yellowish colour, the upperside marked obscurely with 
yellow-brown ; chiefly noticeable are a series of slightly elongate spots in pairs along the middle of the 
posterior half of the upperside; on the underside midway is the characteristic transverse curved opening 
to a spiracular organ, 
The female resembles the male in colours and markings. The genital aperture is well marked and of very 
characteristic form. , 
Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith). 
STEM MOPS, gen. nov. (Theridiide). 
Cephalothorax as broad as long, very nearly round, slightly broader behind than in front; considerably and 
uniformly convex above, showing no traces of the normal grooves and indentations. Clypeus high, more 
than half the height of the facial space. 
Eyes large, subequal, those of the hind-central pair the largest, seated on a large subconical prominence and 
forming a kind of irregular ring round it, the intervals between them being narrow and very nearly equal. 
The four centrals form a trapezoid longer than broad, and a little wider behind than in front. 
Legs rather short, 1, 4, 2, 3, moderately strong, furnished with numerous coarse bristly hairs, with a strong 
erect bristle at the fore extremity of the genuz, and one or two less strong on the tibia. 
Palpi moderately long ; digital joint and palpal bulb of very large size. 
Falces small, neither long nor strong. 
Mazxille short, very strong, straight, but greatly inclined over the labiwm, and pointed at their extremity. 
Labium small, oval, drawn out and pointed at the apex, which reaches nearly to the points of the maxille, 
being thus of an inverted pear-shape. 
Sternum rather broad, convex, heart-shaped. 
Abdomen oval, moderately convex above, clothed with numerous long curved bristly hairs. Spinners short, 
compact, and cone-shaped ; and close in front of them is a small] transverse slit or opening, with dark red- 
brown lip, no doubt the orifice of a spiracular organ. 
Stemmops bicolor, sp. n. 
Adult male, length 1 line. 
The cephalothorax, legs, palpi, falces, maxille, and labium are yellow tinged with orange, the cephalothorax 
with a narrow black margin. The eye-prominence black. 
The eyes are closely arranged in a transverse oval figure round the eye-prominence, or in two transverse rows, 
