INSKCUTOR INSCITI^ MKNSTRUUS 21 



length 0.780 mm., width at base 0.072 mm., at middle 0.057 

 mm., abdomen, width 0,288 mm. 



Antennal segments 1 2 3 4 5 6 7 8 



Length (\i) 26 39 51 48 42 55 10 14 



Width (fi) 30 25 19 17 16 18 7 5 



Total length of antenna, 0.285 mm. 



Male (macropterous). — Length about 0.9 mm. Color and 

 structure essentially as in female. Posterior margin of eighth 

 abdominal tergite with a sparse, comb-like fringe ; ninth tergite 

 with two pairs of short, stout, approximate spines arising from 

 cup-like tubercles and disposed on an arcuate line. 



Measurements of allotype : Length 0.892 mm. ; head, length 

 0.108 mm., width 0.142 mm. ; prothorax, length 0.126 mm., 

 width 0.169 mm. ; pterothorax, width 0.226 mm. ; fore wing, 

 length 0.600 mm., width at base 0.060 mm., at middle 0.049 

 mm. ; abdomen, width 0.204 mm. 



Antennal segments 1 2 3 4 5 6 7 8 



Length (|i) 24 34 49 41 36 50 10 14 



Width (n) 26 22 18 17 16 16 6 5 



Total length of antenna, 0.258 mm. 



Described from 110 females and 24 males, as follows: Vi- 

 enna, Virginia, October 31, 1914, C. B. Williams, 3 females 

 and 1 male; Georgetown, D. C, November 1, 1914, C. B. W. 

 and J. D. H., 16 females and 8 males; Washington, D. C, 

 November 3, 1914, J. D, H., 91 females and 15 males. 



Type locality. — Washington, D. C. 



The species was found abundantly between the husks of 

 standing and freshly cut Indian corn. It is close to but entirely 

 distinct from F. tritici and F. gossypii, as shown by the colora- 

 tion and the form of the head, thorax, and antennae. The male 

 differs from that of the two species just mentioned more par- 

 ticularly in the armature of the ninth tergite of the abdomen. 

 Named after its discoverer, one of the most able students of 

 the Thysanoptera. 



Frankliniella tympanona, new species. 



Female (macropterous). — Length about 1.1 mm. Color dark 

 blackish brown, with orange red hypodermal pigmentation in 



