358 ARANEIDEA. 
DICTYNA. 
Dictyna, Sundevall, Consp. Arachn. p. 16 (1838). 
Mallos, O. P.-Cambridge, Biol. Centr.-Amer., Arachn. Aran. i. p. 308 (1902). 
Type of Dictyna, D. benigna, Walck.=arundinacea, Linn., Europe ; of Mallos, M. niveus, O. P.-Cambridge, 
Mexico. 
The spiders belonging to this genus differ from Temecula in having the posterior 
row of eyes slightly recurved. Dictyna will probably prove to be well represented 
throughout the northern portion of the Central-American region. ‘The type on which 
Mallos is based is an immature male; other examples, male and female adult, occur 
in the collection before me, and I can find no valid reason for separating the species 
from the present genus. 
The species known to me may be distinguished as follows :— 
| Males. 
a. Tibia of palpus with an apical spur ; posterior portion of bulb con- 
voluted, but not distinctly spiraloid . . . . . parietalis, O. P.-Cambr. 
6. Tibia of palpus without any apical spur ; posterior sibetionl of bulb 
distinctly spiraloid. . 2. 2. 2. 1 1 ew ee ee ee ee nived, O. P.-Cambr. 
Females. 
a. External chitinous concavities of vulva elongate-piriform, pos- 
teriorly convergent. . . . . 2. . © © © «© «© «© «© ~~ grandis, O. P.-Cambr. 
. External chitinous concavities of vulva circular. 
oa 
1. Inner margins of chitinous concavities almost in contact ; 
posterior margin of vulva presenting a pair of oval-circular 
adjacent brown discs . . ... . . ae ee parietalis. 
2. Inner margins of chitinous concavities widely separaté, two and | 
a half diameters apart ; posterior margin of vulva presenting 
no discs, but a pair of inconspicuous black spots . . . . . nivea. 
Norr.—It is possible that D. menzata, Banks, is identical with D. parietalis (6 ), for they both have a spur 
on the tibia of the palpus. 
1. Dictyna parietalis, (Tab. XXXIII. figg. 18, ¢; 19, 9.) 
Dictyna parietalis, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 171, t. 21. figg. 5, 
5a-e (3), 6, 6a, b (2) (1896) °. 
Type 3, gynetype @, in coll. Godman & Salvin. Total length, ¢ & 9, 3°5 millim. 
flab. Muxico, Teapa in Tabasco (H. H. Smith?). 
2. Dictyna nivea. (Tab. XXXIII. figg. 20, 20a, 3; 21, 2.) 
Mallos niveus, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p- 3808, t. 35. figg. 1 
la-f(g)’ 
Type 3 (immature), deuterotype 9, in coll. Godman & Salvin. Total length, ¢ 3:5, 2 3 millim. 
Hab. Mexico, Amula in Guerrero (H. H. Smith!); Guaremana (Sarg). 
