194 ARANEIDEA. 
Hab. Mexico, Teapa (H. H. Smith); Guatemata, Yzabal'?; Panama’, Bugaba 
(Champion). : 
Having carefully examined numerous males and females from various localities of 
the two forms described by Peckham under the names A. benignus and A. marjorit, 
differentiated by the relative height of the clypeus, I have come to the conclusion 
that they belong to one and the same species. I cannot discover that the males differ 
constantly in any respect, either in the form of the tibial spur or in that of the tarsal 
bulb and spine. ‘The varying height of the clypeus is a phenomenon frequent 
amongst spiders in the male sex. In the case of the forms under consideration, on the 
clypeus of those in which it is higher than the central anterior eyes will be 
observed an obscure transverse line: this marks the line of the normal development 
of the clypeus. In the specimens named A. marjorii the mandibles are not protruded 
beyond this line. In the case of those named A. benignus there are two forms: (1) with 
the connective membrane recently protruded with the mandibles, and still remaining 
diaphanous (in which case it is not always easy to determine the height of the 
clypeus); (2) with the protruded connective membrane chitinized by exposure, 
forming an extension of the original normal clypeal margin. Neither can I find any 
difference in the females collected with these two forms which would suggest that 
there were two distinct species. 
2. Amycus quadriguttatus, sp.n. (Tab. XIV. figg. 7,7 a-c, ¢; 8, 8a, 2.) 
Type od, gynetype 2, in coll. Godman & Salvin. Total length, d 5, 9 4°5 millim. 
For characters, see the Table of the species. 
Hab. Mexico, Teapa (H. H. Smith) ; Guatemaa (Sarg) ; Panama, Bugaba (Champion). 
It appears to me pretty certain that the female I have placed with the male of this 
species is identical with A. hieroglyphicus, Peckh.; but considering that the males of 
A. quadriguttatus are far more abundant in our collection than those of A. hiero- 
glyphicus (there being only two of the latter), it is probable that the females belong 
to the former, | 
3. Amycus hieroglyphicus. (Tab. XIV. fige. 9, 9 a-c, ¢; 10, 2.) 
Amycus hieroglyphicus, Peckh. Occas. Papers Nat. Hist. Soc. Wise. iii. 1, p. 28, t. 1. figg. 4, 
4a(?),46,¢(38) (April 1896) *. 
Type ¢, gynetype 2, in coll. Peckham. Total length, ¢ 6, 2 5:5 millim. 
Hab. Mexico, Teapa (H. H. Smith); Panama}. 
A couple of males, which I identify as this species from the drawing of the palpus, 
were taken in Mexico. Whether there is any difference between this and A. fallax 
it is difficult to gather from the descriptions, and unless the peculiarities represented 
in the figures are pointed out they lose much of their value. 
