Peckham—Revision of the Attidce of North America. 365 
KEY TO ANT-LIKE SPIDERS. 
p Lower margin of falx with several teeth. Front middle eyes 
j three times as large as lateral eyes.... Synemosyna formica 
1 ] Lower margin of falx with compound tooth. 2 
l Lower margin of falx with single tooth... 8 
2 1 
' Tube of palpus long, slightly curved. Two tibial 
apophyses on palpus. Tibia I with one pair and one 
spine farther back. Eye-region occupying % of 
cephalothorax . Peckhamia scorpiona 
Tube of palpus spiral, heavy at origin and tapering 
at end. Eye-region occupying y 2 of cephalo¬ 
thorax .Peckhamia picata 
Tube of palpus spiral, heaviest in the middle, equally slen¬ 
der at origin and at end, where it bends abruptly. Eye- 
region occupying y 2 of cephalothorax. .Peckhamia americana 
f Cephalic part on higher plane than thoracic. Tibia and 
J tarsus of palpus strikingly enlarged in both 
j sexes .Myrmarachne albocinctus 
l Cephalic and thoracic parts on same plane. 4 
i First leg with tibia much enlarged. Bellota 5 
First leg with femur somewhat enlarged, but otherwise slen¬ 
der (from Texas, near Mexico). Paradamcetas formicina 
f Tibia I longer than femur and plainly longer than wide, 
| with a ridge of stiff hairs, spiny, and truncated at 
5 -| their ends . Bellota Wheelerii 
I Tibia I not longer than femur, and about as wide as long, 
L with a fringe of soft hairs... Bellota micans 
SYNEMOSYNA Hentz. 1845. 
Type, S. formica H. 
1845. Synemosyna H. (formica), Jour. Bost. Soc. Nat. Hist., Y. 
1846. Janus C. K. (gibberosus), Die Arachinden, XIII, p. 21. 
1875. Synemosyna H. (formica), Occ. Pap. Bost. Soc. Nat. Hist., II, 
p. 73. 
1883. Synemosyna P., Descr. New or little known Attidae of U. S., 
p. 30. 
1888. Synemosyna P., Wis. Acad. Sciences, Arts and Letters, VII, 
N. A. Att., p. 93. 
1891. Synemosyna E., Trans. Conn. Acad. Vol. VIII, p. 30. 
1892. Synemosyna P., Occ. Pap. Nat. Hist. Soc. Wis., Vol. II, pt. 1, 
p. 76. 
1901. Synemosyna E. S., Hist. Nat. des Aran., 2nd Ed., II, p. 512. 
1905. Synemosyna B., Am. Nat., XXXIX, p. 320. 
