NEW CALIFORNIA AND GEORGIA THYSANOPTERA. H 



b\ Eyes not pilose; postocular spines present; a prominent spine in front 

 of each posterior ocellus, segments 3 and 4 of antennae not 

 pedicellate; fore-wings without transparent area near base; 

 hind longitudinal vein of fore-wings with about thirteen 



spines Euthrips ehrhomii Moulton . 



y\ Eyes not pilose; postocular spines absent; no prominent spines in front 

 of or between posterior ocelli; segments 3 and 4 of antennae 

 pedicellate; fore-wings without transparent area near base; 

 hind longitudinal vein of fore-wings with about ten spines; 

 mouth-cone very long ... Euthrips longirostrum new species. 

 With spines on fore-angle of prothorax; longitudinal veins on fore--wing8 set regu- 

 larly with spines. 

 a. Fore tibiae armed at end with tooth. Females dark brown, wings brown 

 with whitened area near base; antennae concolorous with 

 head except segment 3, which is light yellow. 



Euthrips ulicis californicus Moulton. 

 a\ Fore tibiae not armed with tooth. 



b. Postocular spines wanting; row of spines along anterior margin of pro- 

 thorax either wanting or at least not conspicuous except 

 often the third from the outer margin. 

 c. Antennae uniformly brown to dark brown, concolorous with body; 

 wings light yellow-brown, veins prominent; spines brown, 

 twenty-three on fore vein, sixteen on hind vein, short and 

 moderately stout; white longitudinal area near base of wing. 



Euthrips minutus Moulton. 

 &. Antennae with segment 3 yellowish; segments 3 and 4 light gray- 

 brown, yellowish at base; wings gray-brown, veins not 

 prominent, spines on wings normally long and stout, four- 

 teen on fore vein, ten on hind vein (wings may be reduced 



to pads) Euthrips fuscus Hinds. 



V. Postocular spines conspicuous. 



(1.) General color uniformly brown to dark brown, no shading of orange. 



Antennae with segments 3, 4, and 5 light brown to yellow 



and shaded. 



a. Uniformly dark brown, fore-wings shaded dark brown, with a 



large whitened area extending across wing near base; spines 



on wings all dark brown Euthrips insulari^ Franklin. 



a\ Color yellowish brown, fore-wings uniformly shaded with gray. 



Euthrips nervosus Uzel. 

 (2.) General color whitish to yellow or yellowish to brown, no shading 

 of orange. 

 a. Segment 2 of antennae with a double spine-bearing tubercule; 

 vertex of head depressed and anterior ocellus directed for- 

 ward. 

 6. Color uniformly yellow, surface of body without reticulation. 



Euthrips cephalicus Crawford . 

 y. Color uniformly brown; surface of body reticulated. 



Euthrips cephalicus var. reticulatus Crawford. 

 a'. Segment 2 of antennas without double spine-bearing tubercule; 

 vertex of head not depressed; anterior ocellus directed up- 

 ward; color yellowish shaded with dusky brown. 



Euthrips helianthi Moulton. 



