1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 495 



tion. There is quite a difference in the coloration of the specimens 

 seen, though none in other directions. 



All the specimens are from Florida. Mr. Schwarz has the followiug 

 dates: Biscayue, May 19,2L; Enterprise, May 24; Lake Harney, May 4. 



The genitalia of the $ are distinctly united in front, and more simple 

 than in the immediately preceding species. The 9 , on the contrary, is 

 very characteristic, and much more strougly developed as to genitalia 

 than the simple characters of the $ would seem to indicate. The infe- 

 rior plates are well developed, and the superior plates and pubic pro- 

 cess are fused into one piece. It is really a modification of the su- 

 perior plates, which are united on the median line. 



8. L. generosa Horn. 



Not in our collection. Dr. Horn had onl\ a single S specimen from 

 Texas, and from this he allowed me to study the genitalia. These are 

 symmetrical, the claspers not united in front, and somewhat unique in 

 shape. The species seems rare, and so far I have not seen any other 

 specimen. 



9. L. praetermissa Horn. 



Not in our collection. The species ( $ only) was collected by Morri- 

 son in Louisiana, but none were in the collection obtained by the Mu- 

 seum. From a specimen loaned by Dr. Horn the genitalia were studied, 

 and are of decided interest as the first showing marked asymmetry of 

 the claspers and partial mobility. Three figures are given showing 

 the claspers from above aud from each side. Quite a different place 

 for this species would seem to be indicated by this structure. 



10. L. prununculina Bnrni. 



Five specimens are in the collection : 1 $ (Florida, coll. J. B. Smith); 

 4 9 (Georgia, coll. Kiley and J. B. Smith). The male is reddish brown, 

 shining ; the females are all blackish, opaque, with slight irides- 

 cence. 



Mr. Schwarz has it from Tampa, Fla., April 28, and Crescent City. 

 Fla., June 8 — au unusually long period for the species. Mr. Ulke's 

 collection contains specimens from Virginia, the most northern point 

 thus far recorded. 



The genitalia of both sexes are distinctive. In the male they are 

 symmetrical, the claspers immobile. They are peculiar by the vertical 

 development. In the female the superior plates are very strongly 

 modified, forming a very obvious lead to some of the strongly devel- 

 oped forms of the rugosa group. 



11. L. glaberrima Blanch. 



Males and females in the collection. Cedar Keys, Fla.. June <i (coll. 

 C. V. B.), 2 $ ; Florida (coll. J. B. S.), 1 S ; Kentucky, 1 5 (coll. J. B. 

 S.); Delaware (coll. J. B. S.), 13; New Jersey (coll. C. V. R.), 1 9 ; 



