252 
Psyche 
[December 
and longer embolus in the male (Fig. 87), and a smaller one (Figs. 
75, 88). The specimens of the first collections studied were care- 
fully separated by these criteria. The smaller ones had the abdomen 
all light in the south, legs black, the abdomen black in the north. 
Larger individuals had the abdomen well patterned. A female from 
Mountain Lake, Virginia (H. K. Wallace collection) had an 
epigynum with the duct longer on one side than the other, and threw 
doubt on my simple classification. As more specimens were deter- 
mined I found that I became more and more arbitrary in deciding 
what was large and had long ducts and long embolus. I decided that 
measurements of the carapace diameter on a large series of females 
should be taken. To my surprise I got a normal distribution and 
not two peaks as I had expected. The large size and color morpho- 
logical variation are found throughout the range of the species. It is 
not geographic variation. Many collections had smaller and larger 
individuals collected together; the larger ones tend to have longer 
ducts and emboli. The smaller males have relatively larger muscle 
scars on the abdomen. I assume that the larger ones go through 
more molts than smaller ones; variation in number of molts is com- 
mon in spiders. The variation resembles that found in certain theri- 
diid spiders, e.g. Thymoites unhnaculatus (Emerton), but in 
Thymoites it is geographic variation. The type of Singa hentzi 
has banded legs, as do some other specimens from Indiana and 
Illinois. 
The size variation of females is total length 2.4-5. 1 mm; cara- 
pace width 0.9-1. 6 mm; males total length 2. 2-3. 2 mm; carapace 
width 0.8- 1. 5 mm. 
Diagnosis. The median piece of the epigynum is more or less 
triangular (Figs. 72, 76, 77) while that of <H. singaeformis is 
concave on each side. The embolus (Figs. 87, 88) is much longer 
than that of H. singaeformis and the terminal apophysis of a different 
shape. 
Natural 1 History . Most collections have been made by sweeping 
in pinewoods, woods, forest edge, shrubs, herbaceous vegetation, 
alfalfa, and clover fields, but specimens have been obtained from leaf 
litter and under bark, and between loose siding of a cottage. The 
males are mature from April to May, February in southern states, 
June in the North. There is one record of a male from Alabama in 
August. Females have been collected from March to July. 
