NEW CALIFOKNIA AND GEOEGIA THYSANOPTERA. 3 



hasal and central clear areas, one spine on basal part and one on distal 

 part of central clear area, four spines between central and apical clear 

 areas, none on apical clear area; posterior longitudinal vein, no spines 

 on basal clear area, five spines between basal and central clear areas, one 

 spine on basal and one on distal part of central clear area, five spines 

 between central and apical clear areas, none on apical clear area. Left 

 fore wing: Anterior longitudinal vein, one spine on distal part of basal 

 clear area, five spines between basal and central clear areas, none on 

 central clear area, four spines between central and apical clear areas, 

 last one on edge of apical clear area; posterior vein, no spines on basal 

 clear area, four spnies between basal and central clear areas, one 

 spine on basal part and one on distal part of central clear area, five 

 spines between central and apical clear areas, none on apical clear 

 area. All spines on white areas nearly inconspicuous. About 37 

 spines on anterior margin of fore wings, nearly inconspicuous v)n the 

 clear areas. Fore wings light brown except above-mentioned clear 

 areas ; microscopic hairs on dark areas brown, on clear areas white and 

 inconspicu ">us ; posterior margin with a long, simple fringe. Hind 

 wings white; anterior margin with a sliort, spine-like fringe; posterior 

 margin with a long, simple fringe. 



Abdomen uniform brown, elongate-ovate, narrow at base, gradually 

 becoming wider until segment 4, which is equally as wide as the segments 

 5, 6, and 7, gradually tapering from segment 7. Segments 1 to 8 

 without conspicuous hairs or spines except two short, curved spines 

 on each side of segment 7, and two on each side of segment 8 near 

 the posterior margin; segment 9 with a circlet of about eight long 

 spines, several smaller spines near the posterior margin; segment 10 

 with a circlet of about six long spines near the middle; last three 

 segments forming a sheath for the upturned ovipositor. 



Described from one female specimen taken on flowers of water- 

 cress {Nasturtium officinale) at San Jose, Cal., May 23, 1910 (P. R. 

 Jones). 



Near A. vespiformis Crawford, but differing in the italicized char- 

 acters. 



7. Genus THRIPS Linnaeus. 



Key to the Species. 



1. Head considerably wider than long. 



a. Body color dark brown, thorax and other parts orange-tinted, inner crescents 

 bordering ocelli orange-red. Individuals large, about 1.25 mm. in 

 length. 

 h. Wings light brown, with lighter colored area near base. 



Thrips madronii Moulton. 

 h' . Wings uniform dark brown to brown Thrips magnus Moulton. 



9383°— 12 2 



