212 
ANNALS NEW YORK ACADEMY OF SCIENCES 
seum and compared them with the specimen now before me. The descrip¬ 
tion of Emerton is so brief that I think it wise to describe in detail the 
structure of the specimen from Onondaga. 
Total length, 12.0; cephalothorax, 6.7 long, 5.4 broad between second and third 
pairs of legs; legs in order 1243. 
Legs 
Femur 
Pat. + Tib. 
Metatar. 
Tarsus 
Total 
I 
7.0 
9.3 
5.1 
2.0 
23.4 
II 
6.5 
8.5 
4.5 
1.9 
21.4 
III 
4.8 
5.0 
' 2.7 
1.3 
13.8 
IV 
6.5 
7.1 
4.7 
1.7 
20.0 
Thoracic part of cephalothorax nearly circular with deep depression a little behind 
its center and a narrow longitudinal sulcus running from the depression forwards a 
little beyond the meeting point of the cephalic sulci; sides of cephalic part parallel, 
distance between edges, 2.5; clypeus narrow, 0.350; all eyes on prominent tubercles; 
diameter of AM, 0.294, AL, 0.168, PM, 0.210, PL, 0.168; distance between inside 
edges of AM, 0.210, of PM, 0.168; distance between side eyes and middle eyes equal 
to one millimeter; quadrangulus broader in front than behind, nearly as long as 
broad in front (0.700 long and 0.742 broad); side eyes contiguous; in middle of 
quadrangulus two small hairs; a strong bristle between middle and side eyes; ster¬ 
num longer than broad (3.3 by 2.0) truncated in front, produced into a sharp point 
behind; cox£e of first pair with dark hump at distal end; coxae of second pair with 
stout conical spur at base; coxae of fourth pair contiguous; femora of first and 
second pair and tibiae of second pair distinctly thickened; legs covered with numer¬ 
ous spines on all members; especially heavy spines on second tibiae; a row of modi¬ 
fied spines on HYS of first, second and third femora; in first and second femora the 
row is formed by five very short proximal and three long distal spines; abdomen 
with two strong humps in front; palpus as figured by Emerton; whole cephalo¬ 
thorax covered with white hair, becoming long towards eyes; hair on abdomen of 
three kinds: very short white, long white with dark base and nearly black hair on 
the humps and spinnerets. 
Color in alcohol: Cephalothorax brown, rather reddish; sternum lighter 
brown with more yellowish tint; back of abdomen with white spot in front, with 
indistinct folium, otherwise grayish brown; legs brown, tibiae lighter in middle third; 
metatarsi and tarsi darker towards end, ventral side uniformly light brown; spinner¬ 
ets somewhat darker; tips of maxillae and of lip light yellow. 
Patria: Onondaga County, N. Y. 
Collection: American Museum. One mature male collected by the 
late H. W. Britcher. 
10. Micrathena horrida Taczanovsky (sub Acrosoma) Hor. Soc. Ent. 
Ross., vol. ix, p. 21, fig. 31. 1872. 
nec M. horrida Simon, Hist. Nat. Araign, vol. i. 1895. 
Plate XXI, Figs. 9, 10, 11. 
The description given by Taczanovsky is exact and his figure excellent. 
If I give here some measurements and the figures of the epigynum and of 
