90 GEORGE II. nORN, M. D. 



and sutural margins of the elytra are paler in many specimens. The 



males are smaller and more slander than the females, and have the 



last joint of the antennte sinuate. 



I am indebted to Mr. Wm. M. Gabb, for this species, collected in 



central Nevada. 



lYTTA, Fab. 



Lytta magister, n. ?p. — "Black, moderately shining; bead, thorax and legs 

 orange yellow. Head smooth, shining, very sparsely and finely punctured, cly- 

 peus, labrum and parts of mouth black. Antennse short, joints moniliform, 

 base of first joint yellowish. Labrum feebly emarginate, and concave and 

 with a slight carina at middle. Thorax smooth and shining, sub-hexagonal, 

 sides not prominent. Elytra elongate, parallel with strongly elevated reticu- 

 tations, less distinct at base and apex. Body beneath black, sub-opaque, densely 

 and finely punctured. Legs orange yellow, tarsi black. Male ; antennpe 

 thickened at middle, joints 4 — 7 somewhat flattened and much broader than 

 the following joints. Last abdominal segment deeply emarginate. Female; 

 joints of antennse gradually thicker to the tip; terminal abdomen segment 

 rounded. Length 1.— .1.40 inch ; 26— .36 mm. 



This is the largest species known to inhabit our territory, and may 

 be distinguished from all our species with sub-hexagonal thorax, by 

 the form of male antennoe, deeply eroded or reticulate elytra and by 

 the legs from the coxce, excepting the tarsi, entirely yellow. No sexual 

 differences are seen either in the legs or spurs. The mid lie tibire in 

 both sexes are slightly arcuate, as in vnlnerafa. The sides of the 

 thorax are much more obtusel}'^ angulate than either vidnerata or 

 Cooppvi. 



Not rare iu Owen's Valley, California. One specimen was taken in 

 Arizona near Gila City. They were all found walking on the ground 

 or feeding on plants. Although they have moderately developed 

 wings none were found in flight. For many of the specimens obtained 

 iu Owen's Valley, I am indebted to Dr. H. M. Cronkhite, Assist. 

 Surg. U. S. A. 



Lytta deserticola, n. sp. — Black moderately shining, head, thorax and femora 

 reddish yellow. Head moderately convex and shining with but few fine punc- 

 tures, hind angles obtuse, clypeus, parts of mouth and antennre black ; labrum 

 coarsely punctured, feebly emarginate. Thorax round, moderately convex with 

 few punctures; basal narrow margin black. Elytra moderately robust, black, 

 finely reticulate. Body beneath black, feebly shining and moderately densely 

 clothed with very short black hairs. Coxae, trochanters, tibipe and tarsi black, 

 femora reddish yellow except a small black space at base and tip ; legs sparsely 

 clothed with short black hairs. Length .76 inch; 19 mm. 



Resembles cUchroa, Lee, or -i-maculata Chevr., in form, and may be 

 known from any of our species with rounded thorax by its finely re- 

 ticulate elytra and by its mode of coloration. 



One female was collected south of Fort Whipple, Arizona. 



