1963] 
Dondale — Florida Spiders 
37 
peninsulanus is a yellow-orange spider with none of the dark body 
and leg patterns found in placidus. The relationship between these 
two species is, however, complicated by the existence of a third form 
with slightly different external genitalia. It occurs along the coastal 
plain of the southeastern United States in Mississippi, northern 
Florida, Georgia, and Long Island, New York and thus coincides 
with the southern part of the range of placidus. It is allopatric with 
peninsulanus , according to present knowledge. Its main characteristics 
are a shorter embolus than in either of the other two forms and a 
shorter and wider median epigynal plate and round spermathecae. 
Too few specimens of the three forms were available from the south- 
east to permit assessment of these differences. 
Philodro/nus marxi Keyserling 
Synonymy. See Kaston (1948), Roewer (1954), and Bonnet 
( 1958 ). 
Description. See Kaston (1948). 
Range. Northeastern Mexico to Florida, north to Minnesota, 
northern New York, and Massachusetts. 
Florida Localities. Liberty County; Quincy; Gainesville; Volusia 
County; Tarpon Springs; Tampa; Clearwater; Terreya State Park; 
Punta Gorda. 
Comments. P. marxi can be distinguished from related forms by 
the basal origin of the embolus on the tegulum, the small, erect lateral 
apophysis on the male palpal tibia, and by the copulatory duct 
of females, which is wound once around the spermatheca. This species 
is almost identical to the type male of P. undarum Barnes ( 1953 ) , and 
differs from it only in the shape of the lateral apophysis of the male 
palpal tibia. In undarum this apophysis is drawn out to a fine point, 
and is inclined toward the cymbium (Barnes, 1953 , Fig. 14). 
Philodro/nus imbecillus Keyserling 
Synonymy. See Kaston (1948), Roewer (1954), and Bonnet 
(1958). Philodro/nus e/nertoni Bryant, 1933, Bull. Mus. Comp. 
Zool. Harvard College 74:184. New Synonymy. 
Explanation of Plate 3 
Figs. 1-7. Lateral apophysis of male palpal tibia. 1 . P. satullus (New 
Jersey). 2 . P. bil'neatus. 3. P. floridensis. 4. P. peninsulanus (holotype male) . 
5, 6. P. montanus (Florida). 7. P. montanus (North Carolina). 
Figs. 8-13. Epigynum of female. 8. P. floridensis (external view). 9. P. 
peninsulanus (external view). 10. P. bilineatus (external view). 11. P. flori- 
densis (internal view). 12. P. peninsulanus (internal view). 13. P. bilineatus 
(internal view). 
Figs. 14-18. Palpus of male, ventral view. 14. P. floridensis. 15. P. bili- 
neatus. 16. P. satullus. 17. P. montanus. 18. P. peninsulanus (holotype male). 
