TWO NEW THYSANOPTERA FROM PORTO RICO 67 



each with about 33 spines, which are shorter and closer together toward 

 base. Legs of first two pairs yellow, rarely with femora lightly shaded 

 with brown ; posterior legs brown, tarsi and extremities yellowish. 



Abdomen stout, lanceolate, and, except under wings, with close trans- 

 verse striae and dense minute pubescence as in Sericothrips ; posterior 

 margin of segments I -8 prolonged into numerous, minute, slender spines, 

 except for a brief space each side of the dorsal median line of segments 

 2-5, and the entire median region, both above and below, of segment 1 . 



Measurements : Length 1.14 mm.; head, length 0. 1 04 mm., width 

 0. 1 32 mm.; prothorax, length 0. 1 24 mm., wadth 0.2 1 2 mm.; pterothorax, 

 width 0.264 mm.; abdomen, width 0.348 mm. Antennal segments: 1, 

 21/<; 2, 38/^; 3, 69/i; 4, 45/^; 5, 36/(; 6, 33//; 7. 1 7/i; 8, 18,«; 9, 15/«; 

 total length of antenna, 0.29 mm.; width at segment 4, 0.022 mm. 



Male. — Length about 0.94 mm. Color orange yellow ; head brown, 

 darker in front ; abdominal segments grayish above ; legs pale grayish 

 yellow; antennal segments 2-5 largely pale yellowish gray, 3 and 4 

 orange at apex ; wings of fore pair dark brownish gray, much paler in 

 basal fourth. In structure much like female. 



Measurements of allotype: Length 0.936 mm.; head, length 0.100 

 mm., width 0.128 mm.; prothorax, length 0.108 mm., width 0.168 

 mm.; pterothorax, width 0.2 1 6 mm.; abdomen, width 0. 1 68 mm. 

 Antennal segments: 3, 66/< ; 4, 45/« ; 5, 33//; 6, 34//; 7, 17,"; 8, 

 18//; 9, 15/«. 



Described from 33 females and 4 males, taken in flowers of Guava 

 {Psidium guajaca L.), Rio Piedras, Porto Rico, June 11, 1912, by 

 T. H. Jones. 



This is a very distinct species, the silky pubescence and transversely 

 striate prothorax separating it at once from aris&ma, salicis, and deca- 

 cornis. Buffa's briefly described pilosus, from Paraguay, differs in the 

 globose form of segments 5-9 of the antennae and the larger fourth 

 segment. 



Suborder TUBILIFERA Haliday 



Family PHLCEOTHRIPID/E Uzel 



Genus PODOTHRIPS nov. 



(/7oyf, the foot ; Ope(p, a wood worm) 



Body depressed, glabrous. Head longer than wide, much narrowed 

 toward base, widest behind eyes, about equal in length to prothorax. 



