22O 



ENTOMOLOGICAL NEWS. 



[May, '09 



Some Apparently New Thysanoptera from Michigan. 

 By A. FRANKLIN SHULL. 



The species herein described were taken in Huron County, 

 Michigan, in the summer of 1908, while I was engaged as 

 Entomologist on the Michigan Biological Survey. As it will 

 be some time before the complete Report of the Survey of 1908 

 is ready for publication, the descriptions of new species are pub- 

 lished here with the permission of the Chief Field Naturalist, 

 Dr. A. G. Ruthven. In the preparation of this paper I have 

 become indebted to Dr. W. E. Hinds for assistance in deter- 

 mining some of the older species ; to Mr. J. Douglas Hood for 

 the loan of several of his types and for comparing another of 

 my specimens with his own ; to Mr. Dudley Moulton for a 

 similar kindness ; and to the authorities of the U. S. National 

 Museum for the privilege of examining their collection. 



The entire collection is to be deposited in the Museum of 

 the University of Michigan. 



Suborder TEREBRANTIA Haliday. 



Family THRIPIDAE Uzel. 

 Genus HETEROTHRIPS Hood (1908). 



Heterothrips salicis n. sp. (Fig. i). 



Female. General color of body dark brown, appearing nearly black 



to the unaided eye by reflected light. Length of body i mm. ; width of 



prothorax .21 mm. ; width of mesothorax .25 

 mm.; width of abdomen .28 mm. Length of an- 

 tennal segments 15 p., 33 ^ 46 /j,, 31 p, 24 )U . ( 21 fj . j 

 16 p., 12 p., 15 yu.. 



Head 2.4 times as broad as long, broadest be- 

 hind. Distinct transverse stria between postero- 

 interior corners of eyes ; other striations forming 

 a transversely elongated reticulum near posterior 

 margin. Cheeks behind eyes bearing several 

 short spines directed forward. Frons deeply 

 emarginate between antennae ; prominent spine 

 beneath base of each antenna. Eyes black, with 

 light brown margins, projecting prominently in 

 front beside the basal segments of the antennae ; 

 spines between facets verysmall. Posterior ocelli 

 ,. situated well back, contiguous with borders of 



Fig. I. Heterothrips sali- 

 cis n. sp. Head, pro- eyes. Mouth cone short, reaching slightly be. 

 thorax and antenna of , T 



f ema i e . yond middle of prosternum. Maxillary palpi 3- 



