1 Tf) PROCEEDTNGS OF THE NATIONAL MUSEUM. 



PARTHENOTHRIPS DRACiENiE (Heeger). 

 Plate VI, figs. 62-65. 



IMtothrips dracxnx Heeger, Sitzungsb. <1. math.-naturw. Classed, kais. Akad. d. 



Wissensch., Wien, XIV, December, 1854., p. 365. Separata. Beitrage znr 



Naturgeschichte d. Insecten Osterreichs, pp. 3-7. 

 Thrips draamx Kegel, Bull, phys.-mathem. Acad. Sciences, St. Petersburg, 



XVI, 1858, pp. 333-336; Melang biolog., II, 6, pp. 628-633. 



IMiothrips dracxnx v. Frauenfeld, Verhandl. d. k. k. zool.-bot. Gesellsch., 



XVII, Zool. Miscellen, XIII, 1867, pp. 793-801. 

 HeUothrips dracsense Pergande, Psyche, III, 1882, p. 381. 



Parthenofhrips dracima; Jordan, Zeit. f. Wiss. Zool., XL VII, 1888, pp. 541-620 



(Biological part). 

 Parthenothripa dracsenx Reuter, Meddel af. Soc. Fauna et Flora Fennica, XVII, 



1891, p. 166. 

 IMloihripH dracxnir Trybom, En torn. Tidskrift, 15 Arg., Haft 1-2, 1893, pp. 



56-58. 

 Pitrtbenothrips dracxnx Uzel, Mon. d. Ord. Thysanopt., 1895, pp. 171-173, pi. ii, 



figs. 12-14; pi. VI, fig. 93. 

 Parihenothrips dracpenx TtJMPEL, Die Geradfliigler Mitteleuropas, 1901, p. 291. 



Female. — Length about 1.15 mm.; width of mesothorax about 

 0.28 mm. General color dusky yellow, more or less strongly shaded 

 with brown, especially upon the abdomen. Head, thorax, and wings 

 covered with more or less clearly defined reticulating ridges. 



Head widest in front through the eyes, four-fifths as wide as length; 

 general shape quadrangular above, though front margin is somewhat 

 elevated in middle; heavily reticulated; cheeks straight, but abruptly 

 constricted at hind edge, neck-like; color quite uniform brownish yel- 

 low. Eyes black, very strongly protruding at fore angles; a slight 

 depression surrounds each eye; ocelli small, approximate, with dark 

 red margins contiguous, situated upon a slight elevation between the 

 eyes and well removed from them. Maxillary palpi two segmented, 

 the second segment being longer and more slender than the first. 

 Antenni^ seven segmented, very slender bej^ond second segment, 

 about two and one-half times as long as the head; relative lengths of 

 segments: 



1 _2_ ^ jl _5^ _6_ J__ 

 5 9.7 20.5 17 16.5 14.3 13.5 



Segment one nearly spherical, fully as long as broad, narrower than 

 two, which is thickest; three to six subequal in thickness and about 

 one-half the diameter of two, faintly ringed; seven very slender and 

 bearing at its tip a still more slender spine, which may be nearly as long 

 as the segment. Segments one and two slightly more dusky yellow 

 than three to five; five is shaded with brown at its tip; six and seven 

 brown or gray -brown. 



Prothorax transverse, fully twice as wide as long and about two- 

 thirds as long as the head, wider behind than in front; sides somewhat 



