52 ARAN EIDEA. 
very slightly the shortest; the hind centrals are slightly nearer together than each is to the hind lateral 
eye on its side. Those of the anterior row are equidistant from each other ; those of each lateral pair 
are contiguous to each other and seated obliquely on slight tubercles. The height of the clypeus is no 
more than half the diameter of one of the fore central eyes. 
Faices moderate in length and strength; straight, vertical, and similar in colour to the cephalothorax. 
Mazxille and lubium dark brown tipped with pale whitish. 
Legs moderately long, 1, 4, 2, 3, tolerably strong, armed with longish spines; of the same colour as the 
cephalothorax, faintly annulated and marked with yellow-brown ; an indistinct longitudinal line of this 
colour on the inner sides of the femora. 
Palpi and sternum similar to the legs in colour. 
Abdomen cylindrical, projecting considerably over the thorax. On each side of the median line near the fore 
extremity is a very small, but perceptible subconical prominence. The upperside has a broad longitu- 
dinal central dark brown band, with a much narrower white one on each side, the latter marginally defined 
by black lines. The central band also has some black as well as white markings on it. The fore part of 
the abdomen is almost entirely white. The sides are marked with black and white, some of the markings 
being rather oblique. The underside is of an olive-brown colour, with a longitudinal row on each side of 
white spots and short bands, the last being a round white spot on each side of the spinners; these rows 
are broadly margined with black. On the fore half of the underside are six small but distinct white spots 
in three pairs or two longitudinal lines. Spinners short, yellowish, marked with deep brown; genital 
process large, prominent and characteristic, and of a brownish-yellow colour. The hinder extremity of 
the abdomen is slightly elongated, and projects distinctly over the spinners when looked at in profile, and 
there are four small white spots forming nearly a square between the upper extremity and the spinners. 
The male resembles the female in colours and in the general character of the markings, but the pattern on the 
abdomen differs: the central band is of a yellow-grey hue, and is longitudinally bisected by a black line 
or narrow stripe until it reaches the middle, when this line joins a black transverse line which cuts the 
central band in two; the side bands of white are continuous though strongly angulated or bent at the 
middle, and also defined by marginal black lines. The sides are alternately and longitudinally striped 
with lines and stripes of olive-brown, black, and white. The underside is black, with a marginal white 
stripe and spots on each side, and two shorter white lines within them and two white spots in a trans- 
verse line at the fore extremity. 
Sternum yellow with a broad margin of black, leaving a long central wedge-shaped yellow marking. 
The palp: are short, similar to the legs in colour; the palpal bulb is of moderate size. The palpal organs are 
prominent, tolerably complex, with some strong corneous projecting processes and spines at their fore 
extremity. 
The above descriptions of this species are made from the specimens preserved in spirits of wine. The 
following (of the male) is taken from Mr. Sarg’s notes on the living spider :—‘ Cephalothorax pale 
olive-green, smooth and shining. Caput well-defined, eyes black, a black narrow line down the centre 
beginning just behind the eyes, and continuing over the thorax; broad black marginal bands on the 
thorax only; legs olive-greenish-reddish-brown ; palpi very pale greenish. Abdomen creamy-Naples- 
yellow, with dark brown linear markings forming a figure within which the colour is of a richer reddish- 
yellow.” The chief point to be observed in regard to the above is the entire absence in the preserved 
specimens of the green tints noted by Mr. Sarg; and the small reliance we can place on the colours of 
such specimens in those cases where (in the Epciride especially) we may suspect our yellow, dull 
brownish-yellow, and whitish hues to have once been of various tints of green. 
Hab. GuaTEMALA, Dolores, Sacrixpur, between Dolores and Chapallal, and San José 
River near Chiquimuh (Sarg). 
ALPAIDA, gen. nov. 
Cephalothorax of an oblong form, rather longer than broad; the thorax rounded but not much broader than 
the caput, the sides of which are parallel and its fore extremity truncated. The caput is much rounded 
at the occiput, and forms at least half of the cephalothorax, 
Legs short, and not very strong, 4, 1, 2, 3, nor very unequal in length. Spines few, slender, and inconspicuous. 
