1979] 
Brady — Spider Genus Trochosa 
169 
lateral eyes (PLE), both much larger than anterior eyes. Eye arran¬ 
gement: anterior eye row slightly procurved, equal or subequal (less 
than 0.02 mm difference) to PME width. PME width less than PLE 
width. PME width greater than length of posterior ocular quadran¬ 
gle (POQ). 
Cephalothorax relatively flat when viewed from the side, tapering 
downward slightly in cephalic region. 
Legs relatively short when compared to carapace length (ratio 
derived by dividing length of leg IV by carapace length 2.4 to 3.2 in 
females and 2.6 to 3.3 in males). Order of leg length IV-I-II-III. 
Order of length of segments: patella-tibia IV—metatarsus IV— 
patella-tibia I in avara group; patella-tibia IV—patella-tibia I— 
metatarsus IV in terricola. Trochosa terricola males have patella- 
tibia I longer than patella-tibia IV. 
Posterior cheliceral teeth 3-3 in avara group, variable in terricola 
(Map 1 and Table 1). 
Epigynum of female with median septum (ms) in shape of 
inverted “T” (Fig. 25). The longitudinal piece ( lp ) broad and flat in 
terricola (Fig. 13) or narrow with a bulbous white structure ( b ) 
filling most of the atrium in the avara species group (Fig. 27). In the 
latter species the transverse piece (tp) of the medium septum has the 
ends curved anteriad. 
Palpus of male with palea (p ) partly sclerotized (Fig. 46) or heav¬ 
ily sclerotized with prominent distal knob (Fig. 40). Embolus ( e ) 
arising on distal or prolateral margin of palea with long intromittent 
part curled distally into a loop (Fig. 30) or with broad pars pendula 
( PP ) and a short intromittent part angled distally (Fig. 45). Conduc¬ 
tor (c) prominent, broad, and concave (Fig. 42). Median apophysis 
(ma) well developed, conspicuously enlarged and directed ventrad in 
some species .(Fig. 43). 
Diagnosis. As described above, representatives of the genus Tro¬ 
chosa. differ from those of other lycosid genera primarily in the 
distinctive color pattern of the carapace. In addition the first eye 
row, which is essentially equal in width to the PME row, the low 
carapace that slopes downward anteriorly, and the relatively short 
legs are features that distinguish Trochosa from other lycosid gen¬ 
era. The relative dimensions of the eye rows compared to one 
another, and the carapace dimensions compared to leg length are 
