232 | ARANEIDEA. 
hind-central pair passing between the eyes of the lateral pairs. The four centrals form a quadrangle 
whose length is greater than its breadth and its anterior longer than its posterior side. 
Palpi similar in colour to the legs, short ; the cubital joint clavate and bent; the radial joint shorter than the 
cubital, rather produced and broadened at its outer extremity, but with no distinct apophysis; digital joint 
small, oval; palpal organs simple, neither very prominent nor complex. 
Abdomen pale dull luteous-yellow. 
Hab. Guatemaua, Senahu (Sarg). 
This remarkable spider is not unlike Diplocephalus culminicola, Sim. ; but it belongs 
much more nearly to the typical Theridion, Walck., which it resembles in the form of 
the palpi. | 
The specimen above described was held fast in the falces of a large Salticid spider, 
Parnenus (Phidippus) cyanidens, C. L. Koch, and was evidently unnoticed by the 
collector; its damaged state is thus sufficiently accounted for. 
ENNA *, gen. nov. (fam. Triclariidz). 
Cephalothorax broad, circular behind; lateral marginal indentations at the caput strong, broad and squarely 
truncated in front; upper surface convex, highest behind, posterior slope very abrupt, normal indentations 
slight. Clypeus prominent; thoracic indentation very small, longitudinal. 
Eyes on tubercles in two transversely curved rows, the convexity of the curves directed forwards ; the anterior 
row much the shortest and very slightly curved—in fact, looked at from in front, quite straight; the 
posterior row long and strongly curved. The fore-lateral eyes much the smallest, the hind-laterals rather 
the largest. 
Legs long, 1, 4, 2, 3, not very strong, extended laterally, the tarsi short; armed with spines on the femora, 
tibia, and metatarsi. 
Falces straight, moderate in length, powerful, and roundly prominent in front. 
Mazxille long, strong, straight, rounded at the outer, and strongly and obliquely truncated at the inner 
extremity. 
Labium oblong, double as long as broad, and truncated at the apex; rather more than two-thirds the length 
of the maxille. 
Sternum heart-shaped, as broad as long, its posterior extremity drawn out into a sharp point. 
Abdomen short-oval. Spinners short, compact, the inferior pair strongest, but rather shortest. Colulus short, 
obtuse; immediately in front of it is a transverse slit opening probably to a spiracular organ. 
This genus seems to be nearly allied to Zriclaria as well as to Dolomedes. In general 
appearance it is more like the former; it has not, however, the slender flexible tarsi of 
that genus. 
Enna velox, sp. n. 
Adult male, length 3-4 lines; adult female, length 34-44 lines. 
Cephalothorax of adult male yellow-brown, with a longitudinal, narrow, irregular or dentated stripe on each 
side pale yellow-brown, and a similarly-coloured tapering band running from the ocular area to the thoracic 
indentation ; this band, however, is marked longitudinally with darker yellowish-brown. The height of 
the clypeus is half that of the facial space. 
The eyes of the hind-central pair are much further apart than from the hind-laterals ; the fore-centrals are a 
little further apart than from the fore-laterals. The length of the anterior row is just equal to the line 
* Nom. propr. 
