364 ARANEIDEA. 
ARISTON. 
Ariston, O. P.-Cambridge, Biol. Centr.-Amer., Arachn. Aran. i. p. 216 (1896). 
Type -A. albicans, O. P.-Cambr. (2). Mexico. 
This spider differs from the type of Uloborus in that the central posterior eyes are 
much further apart than from the laterals, from Miagrammopes in that the central 
posteriors are larger than the lateral posteriors. 
1. Ariston albicans. 
Ariston albicans, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 216, t. 27. figg. 9, 
9a-d (?)". 
Type, 2, in coll. Godman & Salvin. Total length 2:25 millim. 
Hab. Muxico, Teapa in Tabasco (H. H. Smith '). 
MIAGRAMMOPES. 
Miagrammopes, O. P.-Cambridge, Journ. Linn. Soc., Zool. x. p. 400 (1869). 
Type MM. thwaitesii, O. P.-Cambridge. Ceylon. 
The spiders belonging to this genus may be distinguished from those of Uloborus 
and Ariston by the fact that the calamistrum occupies nearly the entire length of 
protarsus iv. J had several opportunities of observing their habits in the forests of 
the Lower Amazons. ‘They lie motionless, stretched straight out on a web, similar 
to that of Hyptiotes. 
The species known to me may be distinguished as follows. Our specimens of 
M. lineatus, however, are too much shrivelled and too small to afford any useful 
characters :— 
Females. 
1. Colour black. Abdomen with four white spots about the middle 
and three dull white oblique blotches on each side. Carapace 
more than one-half longer than broad. Tibia iv. nearly twice as 
long as the protarsus and tarsus iv. taken together . . . . . mexicanus, O. P.~Cambr. 
2. Colour olive-green. Abdomen with an irregular band of white 
spots on each side of the dorsal area. Carapace scarcely longer 
than broad. Tibia iv. scarcely longer than protarsus and 
tarsus iv. taken together. . . 2. 2. 1. 1 ww. ee ee alboguttatus, sp. n. 
1. Miagrammopes mexicanus. (Tab. XXXIV. figg. 13, 13a, 2.) 
Miagrammopes mexicanus, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 116, t, 15. 
— figg. 7, 7a-d (¢)’. ! 
Type, 2, in coll. Godman & Salvin. Total length 10 millim. 
Hab, Mexico, Amula in Guerrero (H. H. Smith }), 
