Hood — Descriptions of New Thysanoptera. 113 



Male (macropterous) .—Length, about 0.8 mm. Color and structure 

 essentially as in female. Tergite of abdominal segment 9 with 2 pairs of 

 long, strong bristles behind middle, but without chitinous finger-like 

 processes. 



Measurements of allotype: Length 0.822 mm. ; head, length 0.084 mm., 

 width 0.129 mm.; prothorax, length 0.123 mm., width 0.199 mm.; 

 pterothorax, width 0.240 mm.; fore wing, length 0.588 mm., width at 

 base 0.078 mm., at middle 0.039 mm. ; abdomen, width 0.216 mm. 



Antennal segments : 12 3 456789 



Length (m) 21 35 64 42 23 24 17 16 19 



Width (m) 28 24 22 22 18 14 11 10 7 

 Total length of antenna, 0.261 mm. 



Described from 6 females and 1 male taken in flowers of Lyonia 

 mariana L. , at Browns Mills, New Jersey, June 3, 1915, by H. K. Plank. 



The elongate third antennal segment, which is three times as long as 

 its greatest width, allies this species to decacornis (described from 

 Mexico), to borinquen (from Porto Rico), to pectinifer (known only from 

 Arizona), and to flavicornis (a Panama species). The antennal colora- 

 tion separates it at once from flavicornis, which, as the name indicates, 

 has yellow antennae; decacornis differs in the very long pedicel of the 

 third segment of the antenna ; borinquen is separable by the delimited 

 ocellar area and the form of the chitinous abdominal plates; while 

 pectinifer differs in the much longer and proportionately more slender 

 fourth antennal segment. 



Sericothrips baptisise sp. nov. 



Female (macropterous). — Length about 0.9 mm. General color pale 

 brownish yellow, with numerous, clearly defined, dark brown markings. 



Head widest across eyes, uniform dark blackish brown in front of 

 occipital line and on ventral and lateral surfaces to base of mouth-cone, 

 abruptly pale yellow behind, about 1.5 times as wide as long and 2.2 

 times as wide as length in front of occipital line; cheeks straight, slightly 

 converging posteriorly; frontal costa with broad, almost rectangular 

 emargination ; entire head transversely striate with close anastomozing 

 lines, excepting the elevated ocellar region which is irregularly and 

 minutely roughened; occipital line evenly arcuate, almost touching eyes 

 or at least much closer to them than to base of head. Eyes nearly as long 

 as the part of head anterior to occipital line, prominent, protruding, 

 pilose, and about 0.8 as wide as their interval. Ocelli almost equidistant, 

 pigment red. Antennae about 2.4 times the length of head, dirty pale 

 yellow in color, with extreme apex of 3, apical third of 4, pedicel and 

 apical two-fifths of 5, and 6-8 smoky brown. 



Prothorax about 1.1 times the length of head, or 1.7 times the length 

 of head in front of occipital line, and about one and three-fourths times 

 as wide as long, lateral and posterior margins rounded, anterior margin 

 nearly straight ; pronotum pale yellow except for a large, sellate, sharply 

 defined, dark brown blotch occupying posterior two-thirds of median 

 two-thirds, this blotch broadly emarginate in front and more narrowly 



