1970] 
Chickering — Erigone 
137 
more very minute cusps each with a bristle and irregularly distrib- 
uted ; the only striations observed are on the front surface and those 
are irregular and probably not used for stridulation. Maxillae: of 
typical shape; each with several small cusps four of which are 
grouped closely together with the others more widely distributed. 
Lip : short as usual ; with basal half excavated. Sternum : of usual 
form; only very moderately convex; extended between bases of fourth 
coxae which are separated by slightly less than their width. Legs: 
1=423 in order of length; patellae three and four each with a 
very slender dorsal distal spine; tibiae three and four each with a 
single slender, dorsal spine near proximal end; true spines not ob- 
served elsewhere. Palp: essential features of patella, tibia and tarsus 
shown in Figures 11-12; the patellar apophysis is exteremely well 
developed; the tibia is quite distinctive; the femur has a series of 
minute cusps on its ventral surface and a weakly developed cusp at 
its base on the prolateral surface. Abdomen: a swelling appears in 
the middle of the venter just anterior to the genital groove; other- 
wise essentially typical of males of the genus. Color in alcohol: 
carapace brownish with darker streaks ; sternum dusky brown ; mouth 
parts yellowish brown ; legs yellowish ; abdomen yellowish on dorsum 
but grayish laterally and ventrally. 
Diagnosis. This species appears to be closely related to Erigone 
autumnalis Emerton. It differs from that species, however, in respect 
to the details of the palp, chelicerae and maxillae. 
Records. The female is unknown and there are no male paratypes. 
Erigone autumnalis Emerton 
Figures 13-16 
Erigone autumnalis Emerton, 1882: 58. The male and female types from 
Boston, Mass, and New Haven, Conn, are in the Museum of Compara- 
tive Zoology. Emerton, 1902: 151; 1930: 165; Keyserling, 1886: 171; 
Banks, 1895: 87; 1899: 189; 1910: 31; 1911: 447; Crosby, 1905: 314; 
Bryant, 1908: 36; Petrunkevitch, 1911: 232; Comstock, 1912: 373; 1940: 
387; Crosby and Bishop, 1928: 19; Jones, 1936: 70; Kaston, 1938: 180; 
1948: 191; Roewer, 1942: 726; Bonnet, 1956: 1757. 
The group of specimens now considered to belong in Emerton’s 
species were for some time considered to represent four new species. 
A thorough restudy of the entire lot has now convinced me that they 
must be regarded as presented here. The appearance of the terminal 
structures in the male palpal tarsus differs considerably depending 
upon the way they are viewed and the degree of expansion at the time 
