﻿CRAWFORD, THYSANOPTERA OF MEXICO AND THE SOUTH 161 



spect except tlie fullowing: Spines on clieek much larger aiul more numerous; 

 forelegs (Fig. 66 D) immense in proportion to female; forefemora with two 

 sharp tooth-like projections at the tip, within, and a depression between them ; 

 foretibise with a prominent anteriorly directed tooth near the base, within ; 

 foretarsi with an immense sharp tooth on inner side; forefemora and foretibise 

 each with one long spine, all other spines very small, .\bdomen about as broad 

 as in female, but tapering more from seventh segment to tube ; tube (Fig. 66 B) 

 with a distinct and large scale at base, bearing two large spines at each upper 

 margin. Measurements about the same as in female. 



Described from one female and one male, taken in sweeping shrubbery. 



Locality: Guadalajara, Mexico. (Crawford.) 



This species is very close to Ph. u::eli Hinds, especially in respect to the 

 forelegs of the male ; but the two species dififer sharply in the form of the head, 

 in the shape and form of the antennse, in the distinct depression in the fore- 

 femora of the female, and in having a scale at the base of the tube in the male. 

 But Ph. raptor is congeneric with Ph. uzcli Hinds, although differing so sharply 

 from it, and the generic description should be altered accordingly. 



Liuthrips unibripeunis uiexicana ii. var. 



This variety is very similar to the sjjecies in many respects ; only the diag- 

 nostic characters are given here. 



Anterior ocellus with a small spine on each side. x\ntennse about one and 

 three-fourths times as long as head; only segment HI and basal half of IV 

 yellow, the rest dark brown to black. Facets of eyes moderately large. Pro- 

 thorax (including coxae) about twice as wide as long. Forewings clouded 

 very light brown instead of black, with a conspicuous vein at base bearing three 

 long spines, and extending about one-fourth the wings' length. Forefemora 

 distinctly enlarged ; meso- and posterior tibiae with a very long, stout, bkmt 

 spine near tip ; all tarsi with a conspicuous fringe of spines on apical margin of 

 both segments ; males with a stout terminal hook ; female tarsi unarmed. 



Measurements: Head, length .26 mm., width .19 mm.; prothorax, length 

 .14 mm., width .30 mm. ; pterothorax, width .38 mm. ; abdomen, width .42 mm. ; 

 total length 1.8 mm. Antenna?: I, .027 mm.; II, .0.^2 mm.; Ill, .082 mm.; 

 IV, .077 mm. ; V, .075 mm. ; VI, .067 mm. ; VII, .059 mm. ; Mil, .028 mm. ; 

 total .46 mm. 



Described from five females and foiu' males, taken on galls of oak, eleva- 

 tion 10,000 feet ; it is not at all certain that this species has anything to do with 

 the formation of the galls. 



Locality: San Pedro Mountains, near Guadalajara, Mexico. (Crawford.) 



Liothrips bakeri n. sp. 



Average length 2.7 mm. ; general color dark lirown to black, thorax ligliter ; 

 entire body surface, including femora and tibiae, conspicuously reticulated. 



Head (Fig. 67 A) fully one and one-half times as long as broad, sub- 

 rectangular, finely reticulated, sparsely spinose ; vertex elevated and produced 

 beyond insertion of antennae, and bearing the anterior ocellus at its apex ; 



