180 pj>ocEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



? Thrips on cabbages, Smith, Economic Ent., 1896, p. 102. 



? Thrips on cucumber, Britton, 20th Kept. Conn. Exp. Sta. for 1896, 1897. 



Thrips tabaci Sirrine, 15th Ann. Kept. N. Y. St. Exp. Sta. for 1896, 1897, pp. 



612-613. 

 Onion Thrips, Sirrine, Bull. 115, N. Y. Exp. Sta., 1897, p. 70. 

 Onion Thrips, Slingerl.^nd, Rural New Yorker, May 8, 1897, p. 309. 

 Thrips tahaci Lintner, 51st Ann. Kept. N. Y. St. Mus. Nat. Hist., 1898, p. 363; 



Separata, 13th Kept. Inj. Ins. N. Y., 1898, p. 3:^^3. 

 T/irips .s<n«iM.s Gillette, Bull. 47, Col. Exp. Sta., l"-8, p. 44. 

 Thrips tabaci Quaintance, Bull. 46, Fla. Agr. Exp. Sta., 1898, pp. 103-114, figs. 



10-12. 

 Thrips tabaci Howard, Yearbook, IT. S. Dept. Agr. for 1898, 1899, pp. 142, 143, 



fig. 27. 



Thrips tabaci Pettit, Bull. 175, Mich. Exp. Sta., 1899, pp. 343-345, figs. 1,2. 



Thrips tabaci Quaintance, Bull. 20, N. S., U. S. Dept. Agr., p. 59. Remedies, vari- 

 ous authors, 1899, p. 60. 



Thrips tabaci Webster-Mally, Bull. 20, N. S., U. S. Dept. Agr., 1899, pp. 67-70. 



Thrips in Greenhouses, Fernald-Hinds, Bull. 67, Mass. Exp. Sta., 1900, pp. 9-12. 



Thrips communis TIjmpel, Die Geradfli'igler iNlitteleuropas, 1901, p. 293. 



Thrips tabaci Garman, Bull. 91, Kentucky Exp. Sta., 1901, pp. 42-45. 



Thrips tabaci Webster, Journ. Columbus Hort. Soc, XVI, 1901, No. 3, 7 pp., 

 4 figs. 



Thrips tabaci Hinds, Proc. 17th Ann. Conv. Soc. Amer. Florists, 1901, pp. 90-92. 



Female. — Length about 1.1 iinn.; width about one-fourth the length. 

 Color quite uniformly light 3^ellowi.sh varying to brownish yellow. 



Head one-fifth wider than long; cheeks slightly arched behind the 

 eyes; frons slight!}' arcuate between them; occiput indistinctly trans- 

 versely striated; hairs upon the head few and minute; eyes not pro- 

 truding, coarsely granulated, very dark red b}' reflected light, black 

 by transmitted light, sparsely pilose; ocelli sul>approximate, standing 

 well back to the line of the hinder edge of the eyes but posterior 

 ocelli not contiguous with margins of eyes; color light j^ellow, mar- 

 gined inwardl}^ with light brown crescents. Maxillary palpi three 

 segmented; first and third segments equally long, second shorter.: 

 Antennie seven segmented; relative lengths of segments as follows: 



J^ ^ 3 ^ 5 6 7 

 4.4 8.7 11.1 10 8.6 10.6 4 



Segment one short and globose; two barrel-shaped; three to fivej 

 pedunculate, elongated ovoid; five joined by moderately broad surfacel 

 to base of six which tapers somewhat f i"om its middle to its apical 

 end; seven tapering slightly, blunt at apex. Segment one lightest in 

 color, clear light yellow; two, six, and seven uniformly light grayish! 

 brown; three light brownish yellow; four and five colored like three at 

 their bases l)ut apices nearl}^ as dark as six. [ 



Prothorax as long as head, one-half wider than long; pronotum, 

 indistinctly transversely striated and sparsely clothed with small 

 spines; each hind angle bears a pair of very stout, conspicuous spines. 



