224 GEO. H. HORN, 31. D. 



8. H. obliterata Lee. — Olilong oval, convex aud moderately robust, color 

 siibopaque, blue. Antennse piceous, with slight metallic lustre, a little longer 

 than half the body, joints 2-3-4 gradually longer. Head finely alutaceous, a 

 group of coarse deep punctures near each eye, frontal carina obtuse, tubercles 

 small. Thorax one half longer than wide, narrowed in front, sides arcuate, 

 more strongly anteriorly, margin very narrow, slightly thickened at the front 

 angles, disc convex, ante-basal impression almost entirely obliterated, visible at 

 times only near the sides, surface subopaque, finely alutaceous. minutely and 

 rather closely punctulate, an oblique series of slightly larger punctures beginning 

 at the front angles. Elytra not wider at base than the thorax, humeri obliter- 

 ated, umbone scarcely distinct, a slight flattening within it, surface subopaque, 

 finely and rather closely punctulate, a little more coarsely near the base. Body 

 beneath aud legs colored as above : abdomen moderately closely punctate. Length 

 .18— .26 inch. ; 4.5—6.5 mm. 



The male has the hist ventral sinuate each side, the median semi- 

 circular lobe short, flattened, smoother, the apical edge slightly re- 

 flexed. 



This species is one of" the largest in our fauna. It is especially 

 known by the opaque blue color, convex and robust form, and almost 

 entire obliteration of the ante-basal impression. 



Occurs in Arizona and New Mexico. 



9. H. evicta Lee— Oblong oval, subdepressed, brassy bronze, shining. An- 

 teunsB a little longer than half the body, piceous, bronzed near the base, joints 

 2-3-4 gradually longer. Head smooth posteriorly, rugulose near the eyes, frontal 

 carina moderately prominent, the tubercles not separated by the usual line. 

 Thorax one-half wider than long, narrowed in front, sides arcuate, margin nar- 

 row, distinctly thickened at the front angles, disc moderately convex, the ante- 

 basal impression fine, but well impressed, terminating at each end in a fovea ex- 

 tending toward the base, surface distinctly alutaceous, finely sparsely punctate, 

 a little more coarsely near the sides and base. Elytra distinctly wider at base 

 than the thorax, humeri obtuse, umbone moderately prominent, a distinct de- 

 pression within it, surface shining, finely punctate, more closely at base aud 

 along the suture, smoother at sides and apex. Body beneath and legs colored as 

 above ; abdomen rather coarsely sparsely punctate. Length .18 inch. ; 4.5 mm. 



The last ventral of male is very slightly sinuate each side, at mid- 

 dle subtruncate, a vague, longitudinal, smoother impression. 



At first glance this species is very like Phyllodecta vulgatlssima in 

 form and color. It is the only species at present known in our fauna 

 with the ante-basal groove terminating in a fovea at each end. 



Occurs in Oregon. 



10. H. seriiginosa Lee. — Oval, slightly oblong, feebly convex, greenish 

 bronze, feebly shining. Antennge a; little longer than half the body, piceous, 

 slightly bronzed at base, joints 2-3-4 gradually longer. Head subopaque, aluta- 

 ceous, a few large punctures near the eyes, frontal carina very obtuse, tubercles 

 small. Thorax a little more than half wider than long, narrower in front, sides 



