SIMONELLA. 169 
SIMONELLA. 
Janus, C. Li. Koch, Die Arachn. xiii. p. 21 (part.) (1846) (nomen preoce.*). 
Simonella, Peckham, Proc. Nat. Hist. Soc. Wisc. 1885, p. 24 (Dec.). 
Type S. americana, Peckham. Guatemala. 
@. Eyes in four rows. Cephalic quadrangle of eyes a little broader than long; those of the posterior row 
larger ; those of the third row nearer to the posteriors. Coxe and trochanters of legs iv. very strong ; 
those of iii. rather longer and stouter than those of i. and ii. Sternum more than three times longer 
than broad, truncate in front, pointed behind. Labium and maxille short; mandibles small, situated 
well behind the anterior margin of the carapace. Pedicle distinct. Abdomen with an oval-oblong 
anterior dorsal scutum, also a ventral epigynal scutum. Carapace deeply indented behind the eyes; 
abdomen indented and constricted just behind the dorsal scutum. Legs 4, 3, 1, 2. 
3. Generally similar to the female, but the abdomen is divided in the middle by a greater or lesser 
constriction and almost the whole dorsal area is covered by a chitinous scutum, in addition to the epigynal 
ventral scutum, and a central one extending along three-fourths of the ventral area. The cephalic 
region in some wales is more circular at the sides. Tibia of the first pair of legs with 2—2—2 spines 
beneath. 
Note.—Peckham [Trans. Wisc. Ac. Sci. 1884, p. 278 (March) ] selects Janus melano- 
cephalus, C. Koch, as the type of Janus=Janigena, Karsch ; Synemosyna formica, 
Hentz, as the type of Synemosyna, Hentz; while S. americana, Peckham, is the type 
of Simonella. These species are evidently very closely allied, but not having seen the 
two former one cannot say whether or not they ought to be generically separated, though 
they probably all belong to the group Synemosynee. 
Males. 
a. Caput jet-black. 
1. Size larger, length 8°5 millim. Tibia of palpus longer than broad, 
at least as long as the tarsus, with a broad — spur on the 
outer side .. . . . americana, Peckh. 
2. Size smaller, length 6 millim. Tibia ‘of palpus not ‘Longer than 
broad, shorter than the patella, the two together being as long as 
the tarsus. Tibial spur long, stout, bluntly pointed at its apex 
and slightly curved inwards; mandible with an angular prominence 
on the anterior lateral part at the base . . . . . . . . decipiens, O. P.-Cambr. 
6. Caput orange or golden-brown, with eyes situated on black spots ; 
mandible with a stout cusp on the anterior lateral front at the base. 
Length 75 millim. . . 2. 2... ee ee ew ee) CBtcolor, Peckh. 
Females. 
a. Caput jet-black, thoracic area bright orange. Abdomen unicolorous 
beneath, with a single transverse brown girdle in the middle of the 
dorsal area, extending down the sides, followed by an oblong-oval 
central dorsal vulva, consisting of a straight transverse slightly 
sinuous rim remote from the genital rima, with a small dark pit just 
* Stephens, Hymenoptera, 1835. 
BIOL. CENTR. “AMER., Arachn. Aran., Vol. 1I., November 1900. 2t 
