7\op ica I Fa lilt a nf Floi 'Ida. 53 



hitherto hfL'u sup^iosed. the number in Cnlroplcra alone 

 amountinu-. according to a very low estimate leased U])on my 

 collection, to at least 300 species not yet in our catalogues."' 

 (Entomologica Americana, IV. No. 9, 1888.) Since the above 

 was published, Mr. Schwarz has had the kindness to inform me 

 that this semitropical insec-t tauna of southern Florida com- 

 prises in all not less than 1,000 si)ecies of ^^"est Indian or 

 Antillean insects (of which about half are Oilcoptcra), and 50 

 genera of Coleopterd and Hcteroptera alone;* hence the total 

 number of genera must be very considerable. 



Among the INlollusca. Dr. Wm. H. Dall informs me that 20 

 species or specific t3'pes of Antillean land shells arc known to 

 inhabit southern Florida. rc})resenting 13 genera or subgenera 

 not found further north. t 



So far as vegetation is concerned, the case is even stronger, 

 there being n})wards of 350 genera of plants in Florida that do 

 not inhabit Canada ; and Professor Charles S. Sargent, in speak- 

 ing of the trees of southern Florida, states : " A group of arbores- 

 cent species of West Indian origin occupies the narrow strip of 

 coast and islands of southern Florida. * * * This semitrop- 

 ical forest belt reaches Cape Malabar on the east coast and the 

 shores of Tampa Bay on the west coast. ^ * * The species 

 of which it is composed here reach the extreme northern limit 

 of their distribution ; they -are generally small, stunted, and of 

 comparatively little value. Certain species, however, attain re- 



*]Mr. Schwarz has kindly given me the following list of families 

 of Central American Coleoptera, indicating the number of genera in each 

 lUniilv known to inhabit Semitropical Florida, but not found elsewhere 

 in' North America : ('amhkhv, 2 genei-a ; PJialucridcC, 1 ; CoccineUidH', 1 ; 

 Cacujidic, 1 ; MijcetophagidH:, 1 ; Elaterkhr, 1 ; Scarab n' id if, 2 ; Cerumhi^cidtt', 5 ; 

 Cliriixuniflkhv, i; Tcnebrlonidic, 'A ; Mononimidn', 1 ; OtioriupicJiuhi', 1; <'ar- 

 cidionidiv, (3 ; Bn'nthldiv, 1 [this is the only genus which reappears at Cape 

 San Lucas]; Cahiiidrida', o; Scoh/tidir, ',i; AntJiribUJie, 2. He informs me 

 also that 11 genera of Tropical American Heteroptera have been found in 

 the same belt. 



t The forms here referred to are: Strubila JndjbardiiHYOwn; Helix cicca 

 HdLt: «iy("((/tsMke. ; Bulimidus iiLultilineatm^ Say; Bidinndus donnaid W. G. 

 B.; (MliaUcuit uiidafus Brug ; Litjuas fasciatus IMiiller ; Liguus fasciatus var. 

 S/rnogt/ra gracilli)iin Pfr. ; Slfiiogi/ra ftuhula Pfr. ; Macroceramus gossei Pfr.; 

 Macrocera III iin ponlificus GU.,{ii^so orruvs in Texas) ; SfropJiia inrana ]->inn. ; 

 Auricida jM'llnccna Mke. ; Traliii miiiii.scida Dall; Mtiampiis (Ihfraeia) bid- 

 loidt'x ^lont. ; I\'dipe>f mirabilii> IMuhlf. ; Pcdipes dongatiis Dall ; Pktnorbis 

 tainidus Pfr. ; Sphverium cuhense Morelet. 



