U. S. D. A., B. E. Tech. Ser. 23, Pt. T. I.^sued January 26, 1912 



MISCELLANEOUS PAPEES. 



SOME NEW CALIFORNIA AND GEORGIA THYSANOPTERA. 



By Paul R. Jones, 

 Entomological Assistant, Deciduous Fruit Insect Investigations. 



INTRODUCTION. 



In the present paper Moulton's arrangement of genera has been 



followed and his key to North American species has been adapted to 



include the species herewith described. The numbers preceding the 



genera in the text agree with those in Moulton's paper/ to which the 



present article is supplemental, and will facilitate the use of these two 



publications. 



4.2 Genus ^OLOTHRIPS HaUday. 



Key to the Species. 



1. Fore wings with, dark cross-bands. 



a. White band around abdominal segments 1 and 2; last four segments of antennae 

 much longer than fifth. 

 b. Segments 2 and 3 of abdomen white; wings with cross- veins. 



Molothrifs bicolor Hinds. 

 b\ Segments 1, 2, and posterior half of 3 white; wings without cross- veins. 



Molothrips vespijormis Crawford. 



a'. Without white band around first two abdominal segments ; last four segments of 



antennae approximately as long or a little longer than the fifth alone. 



b. Last four segments of antennae equal to the fifth alone, third segment one 



and one-third times as long as 1 and 2 together; wings with cross-veins. 



^olothrips Jasciatus Linnaeus. 

 b'. Last four segments of antennae one and gne-fourth times as long as seg- 

 ment 5, segment 3 one and one-half times as long as 1 and 2 together; 

 wings without cross-veins Molothrips nasturtii new species. 



2. Each fore wing with dark longitudinal band along posterior margin. 



a. With veins in anterior wings normal as in most species of the genus. 



Molothrips huwanaii Moulton. 

 a'. Without veins in anterior wings Molothrips longiceps Crawford. 



Note.— In connection with the bureau's investigation of the pear thrips and the orange thrips in Cah"- 

 fornia during the past few years, it has appeared desirable to obtain as much information as possible on the 

 characteristics, life histories, and food habits of related species of Thysanoptera, and as opportunity has 

 offered observations on these insects have been made. In this way many species have been collected, some 

 of which were found to be new to science. Mr. Moulton's paper i dealt with specimens obtained by him 

 while connected with the investigation, and in the present paper Mr. Jones presents descriptions of several 

 species which he has obtained in the course of his work during the past two years, and \\ hich have not here- 

 tofore been recognized. A. L. Quaintance, 



In Charge of Deciduous Fruit Insect Invextigations. 



1 Tech. Ser. 21, Bur. Ent., U. S. Dept. Agr., 1911. 



» The numbers preceding this and other genera are the same as those used by Moulton in hisclassification. 

 (See Tech. Ser. 21, Bur. Ent., U. S. Dept. Agr.) 



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