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oe 
ARANEIDEA.. --- 
very nearly a square, the anterior side being slightly shorter than the posterior side. The lateral eyes of 
the anterior row are largest, the hind laterals next, and the four centrals smallest. 
The abdomen is broad and rounded behind, narrow and rounded in front; of a pale yellowish-brown hue flecked 
The 
with white on each side of the anterior half, and with two large conspicuous white round or oval spots in a 
transverse line near the middle of the upperside, and placed in conjunction with some irregular deep rich 
black-brown markings forming altogether a large triangle ; this is followed towards the spinners by some 
transverse bars of the same colour, forming (some at least) broken angular marks or chevrons. The lower 
part of the sides, as well as some portion of the underside, principally in the vicinity of the spinners, are 
also marked with dark brown. The abdomen is furnished sparingly with hairs and a few bristles. The 
genital aperture is small and simple, but characteristic in form. (One example of the female has the 
abdomen completely dark rich reddish-black-brown, with only the two white spots, followed by several 
fine pale angular stripes or chevrons, decreasing in length to the spinners.) 
male has the cephalothorax entirely deep rich reddish-black-brown, the eyes margined with yellowish. 
The legs are much longer than those of the female; the femora, genus, and tibie of the first and second 
pairs similar to the cephalothorax in colour, excepting a paler annulus near the middle of the tibiee. The 
rest of the legs and the palpi are pale yellowish. The femora of the first pair are furnished with, some 
long strong spines, the second pair having fewer spines ; those on the tibia of both pairs are also strong. 
The palpi are short; the cubital and radial joints are of equal length ; the latter has several strong bristles, the 
longest and strongest of a tapering spine-like form on the inner side, and a small prominent spine-like 
pointed apophysis at its extremity on the outer side. The digital joint is rather small, oval, rather sharp- 
pointed at its extremity. The palpal organs are simple, neither prominent nor highly developed. 
The abdomen is entirely deep rich reddish-brown both above and below, excepting the two white characteristic 
spots on the upperside. 
Hab. GuateMaa, Chicoyoito, Cahabon, Chichochoc, Coban (Sarg). 
RUNCINIA, Simon. 
Runcinia vigilans, sp. n. 
Adult female, length 2 lines ; adult male, length rather over 1 line. 
The 
The 
The 
cephalothorax is bright yellow-brown, narrowly margined with dull yellowish, with a large oval portion on 
and around the thoracic junction of a paler brownish-yellow hue ; from the middle of thisa white line runs 
forward, becoming indistinct where it approaches the eyes ; on each side of this line is another less distinct, 
the two converging towards but not reaching the thoracic junction. The sides of the cephalothorax are 
also marked with some irregular somewhat sinuous pale lines. The whole is clothed with short pale 
bristly hairs. The ocular region is paler than the rest, and has a curved transverse white line running 
across it just in front of the posterior eyes, marking the edge of a sharp transverse ridge. 
eyes are minute, the fore laterals being distinctly largest; the quadrangle formed by the four centrals is 
rather broader than long, and the anterior side of it is the shortest. The height of the clypeus is consi- 
derably less than half that of the facial space. The intervals between the eyes of the posterior row are 
as nearly as possible equal. 
legs are tolerably long and moderately strong, the second pair being much longer than the first pair; the 
colour of these last, and that of the two posterior pairs, is pale dull yellowish; the colour of the second 
pair is dark yellow-brown, mottled with dull cream-colour underneath, the metatarsi and tarsi being less 
dark than the rest. The metatarsi are armed underneath with five pairs of strong spines, while those 
(three pairs) under the tibise are much less strong. 
The fulces are strong, conical, and of a brownish-yellow colour, mottled in front with whitish. . 
The abdomen is of the ordinary Thomisid form, broadest behind, truncated in a very slightly curved line in 
front. Upper surface flattish ; sides and hinder side steep, strongly rugulose longitudinally on the sides, trans- 
versely behind ; of a clear yellow-brown hue marked above with rather irregular transverse broken black 
stripes which are continued obliquely over the sides, and two largish black spots in a transverse line near 
