Vol. XXV, pp. 61-76 April 13, 1912 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW GENERA AND SPECIES OF NORTH AMERICAN 

 THYSANOPTERA FROM THE SOUTH AND WEST. 



BY J. DOUGLAS HOOD 

 Bureau of Biological Survey. U. S. Department of Agriculture. 



The present paper adds to the known Thysanopterous fauna 

 of North America four new genera and six new species, while 

 three species and one variety are relegated to synonomy. This 

 latter is not surprising in view of the number of workers who 

 have described species after but little work on the group. 



Our knowledge of the western and southern Thysanoptera 

 was in 1908 limited to a paper by Dudley Moulton on the Cali- 

 fornian species.* One year later, however, Mr. D. L. Crawford, 

 then a student at Pomona College, Claremont, California, was 

 a member of a party of two which made an entomological expe- 

 dition to Guadalajara, Mexico; and after his return he described 

 a supposed new genus and several new species, t 



The new genus, to which he gave the name Rhaptothrips, has 

 been suppressed by Bagnall,! who directs attention to the fact 

 that the form described is a nymph. 



Another species, which Mr. Crawford described as Liothrips 

 mcconnelli, belongs in the genus Leptothrips Hood,§ as do Crip- 

 tothrips (sic!) californicus Daniel II and Phyllothrvps fascicidata 

 (sic! ) Crawford. If Furthermore, I can detect no differences 



• I". S. Dept. Agr., Bur. Km.. Tech. Ser. 12, I't. Ill, pp. 39-68; 1907. 



t Pomona College Journal of Entomology, Vol. I. pp. 109-119; Dec, 1909; and Vol. 

 II hi.. 153-170; March, 1910. 



t Ami. Soc. Km. Belg., Tom.- LIY. p. 162; 1910. 



vS Km. News, Vol. XX, p. 249; June, 1909. 

 Ent. News, Vol. XV. p. 293; Nov., 1904. 



IT Pomona foil. Journ. Km., Vol. I, p. 105; Dec, 1909. The variety slennceps Craw- 

 ford ( ii Icm, i>. los) belongs in synonomy, having been erected for the reception of specie 

 mens of the typical form which had not become crushed in the mounting. The figure 

 which he gives on p. 107 shows this facl verj clearly. 



VI— Pi;oc. Biol. Soc. Wash., Vol. XXV, 1912. (61) 



