TWO PORTO RICAN THYSANOFTERA FROM SUGAR CANE 39 



1908. Heliothrips femoralis Buffa. Redia. Vol. V, p. 135. 



1 909. Heliothrips femoralis Bagnail, Journ. Econ. Biol., Vol. IV, p. 39. 



This is an abundant and destructive pest in the greenhouses of Finland, 

 Sweden, Belgium, England, Italy, and the United States. Its native 

 home has been open to conjecture, though its occurrence in greenhouses 

 and the known distribution of the other species of the genus have sug- 

 gested a Neotropical origin. Mr. Thomas H. Jones took one female 

 from sugar cane at Rio Piedras, Porto Rico, January 20, 1914. Fur- 

 ther collections and observations are necessary, however, before the spe- 

 cies may safely be considered indigenous to the West Indies. 



The following records add four States to its known distribution in 

 North America: Ithaca, New York, April 15, 1912, J. C. Faure; 

 Vienna, Virginia, September 1 6, 1 9 1 3, R. A. Cushman ; Urbana, Illi- 

 nois, March 9, November 2, and November 20, C. A. Hart, R. D. 

 Glasgow, J. J. Davis, and J. D. Hood ; Champaign, Illinois, January, 

 1914, Alvah Petersen ; Lincoln, Nebraska, February 1 3, March 1 0, 

 and June 29, Lawrence Bruner. The specimens recorded above were 

 all taken in greenhouses. 



Haplothrips (?) tibialis, new species (fig. !)• 



Female: Length about 1.2 mm. Color dark blackish browTi, with a 

 reddish cast due to amaranth purple ' hypodermal pigmentation ; all tibiae 

 and tarsi, and apices of fore femora, pale yellow ; segment 3 of antenna 

 yellow, segments 4-6 with basal two-thirds, half, and third, respectively, 

 nearly white. 



Head about 1 .2 times as long as wide ; cheeks parallel ; vertex slightly 

 produced, the anterior ocellus overhanging ; dorsal and lateral surfaces 

 almost free from sculpture, set with a few inconspicuous bristles ; postoc- 

 ular bristles capitate, about 0.75 as long as eyes. Eyes one-third as long 

 as head in dorsal aspect, not protruding, rounded ; on ventral surface of 

 head produced posteriorly in an acute angle, and 1 .4 times their dorsal 

 length. Posterior ocelli opposite a line drawn behind anterior third of 

 eyes. Antennae about 1.7 times as long as head, noticeably slender; 

 exposed portion of segment 1 two-thirds as long as 2 and three-fourths 

 as long as wdde ; segment 2 about 1 .6 times as long as wide ; 3 subcon- 

 ical, nearly twice as long as wide, slightly shorter than 4 ; 4-6 succes- 

 sively shorter, nearly barrel-shaped, pedicellate ; 7 oblong, briefly pedi- 



' Robert Ridgway. Color Standards and Color Nomenclature, PI. XII, 1912. 



