AET. 6 TROPICAL AMERICAlSr AFTER YGOTA EOLSOM 11 



that it is necessary to drop such a well known name as Gremastoce' 

 phalus. 



The species described here is quite different from either the 

 Floridan species hcmksii MacGillivray or the Californian trilobatus 

 Schott. 



SALINA WOLCOTTI, new species 



Plate 7, figs. 61-64; Plate 8, figs. 65-67 



Yellow, marked with black (fig. 61). Mesonotum bordered with 

 black laterally and anteriorly. Body with black spots, mostly 

 amoebiform with a clear central spot. Small individuals, and an 

 occasional large one, have few if any black markings on the body, 

 or have at most the marginal pigment of the mesonotum. Antennal 

 segments apicaily black. Legs yellow; femur with a distal black 

 spot; tibiotarsus with a small proximal and a large distal spot. 

 I'urcula yellow. Eyes (fig. 62) 8 + 8, the two inner proximal smaller 

 than the others. Antennae a little longer than the head and body ; 

 second and third segments subequal; fourth one-half longer than 

 the third. Ratio of body segments, excepting prothorax, as 

 31:17:18:25:9:81:17:11 or 35:22:19:32:10:108:27:17. Abd. 4 

 nine to twelve times as long as abd. 3. Tibiotarsus divided into two 

 subsegments by a suture two-fifths from the apex. Unguis (fig. 63) 

 with two pairs of inner teeth, the proximal teeth larger than the 

 distal. Unguiculus with an inner angle-tooth. Tenent hair strong, 

 broadly expanded apicaily, as is usual in the genus. Furcula about 

 two-thirds as long as the body, but variable in length, extending 

 only to the ventral tube, or to the middle of the mesothorax. Dens 

 varying from slightly longer to one-fourth longer than the manu- 

 brium, Mucro suboblong (figs. 64-66) except in young individuals 

 (fig. 67), commonly bilobed apicaily (fig. 64), occasionally with a 

 small or obscure third tooth (figs. 65, 66). Apical scale of dens 

 (fig. 64) as long as mucro, subelliptical, ovate or obovate. Corpus 

 of tenaculum with a strong anterior seta, and sometimes a small 

 second seta below the first. Maximum length, 1.7 mm. 



The third tooth of the mucro was disting-uishable in 8 mucrones 

 out of 28. In one individual the left mucro was bilobed and the 

 right trilobed (fig. 65). The dorsal tooth of the mucro is usually 

 larger than the ventral. 



Numerous specimens collected on cotton leaves were almost en- 

 tirely yellow. 



The type material consists of an abundance of specimens collected 

 in Porto Rico by G. N. Wolcott, after whom the species is named. 

 He says that these springtails on corn are moderately abundant on 

 the north side of the island, and on the south (dry) side of the island 

 occur in enormous numbers. 



