184 GEO. H. HORN, M. D. 



The opaque and totally black surface will enable this species to be 

 readily recognized. It is even more elongate and depressed than 

 concinna. 



Occurs in New Mexico and Arizona. 



8. <E. interjectionis Crotch.— Elongate oval, moderately convex, shining. 

 Antennge brown, half the length of body, third joint a little longer than fourth. 

 Head bicolored, front yellow, occiput piceous, frontal carina indistinct, tubercles 

 feeble, vertex coarsely punctured between the eyes. Thorax twice as wide as 

 long, feebly, arcuately narrowed to the front, lateral margin distinct, color pale 

 yellow, surface smooth, shining. Elytra a little wider at base than the thorax, 

 humeri rounded, umbone distinct, disc finely punctate, smoother near apex, 

 piceous with blue or green lustre, margin narrowly yellow, disc with an inter- 

 rupted vitta near the suture in a general form like an exclamation mark (!). 

 EpipleuriB pale, the inner half near the base piceous. Body beneath reddish 

 yellow, the metasteruum posteriorly piceous Anterior and middle legs and 

 posterior tibife brownish. Abdomen shining, very sparsely punctate. Length 

 .23— .25 inch. ; 6—6.5 mm. Plate V, fig. 6. 



This species is very constant. I have one specimen in which the 

 anterior portion of the vitta is indistinct. The specimen described 

 by Crotch was plainly immature, as it show^s none of the metallic 

 surface of all the other specimens examined. 



ffi. gracilis Jacoby (Biol. Cent. Am. vi, i, p. 420, pi. xxiv, fig. 14), 

 is merely a variety of this species with the subsutural white vitta 

 entire. According to Mr. Jacoby the elytra may be entirely blue- 

 green, without vitta. 



Occurs in Texas (Waco, Belfrage) and Mexico. 



9. <E. fimbriata Illig. — Oblong oval, moderately convex, feebly shining, 

 yellowish white, thorax maculate, elytra vittate or not. Antenna- half as long 

 as the body, piceous, scape often paler, third joint a little longer than fourth. 

 Head variable in color, coarsely and closely punctate between the eyes, frontal 

 carina obtuse, tubercles distinct. Thorax more than twice as wide as long, 

 feebly arcuately narrowed to front, margin narrow, front angles not dentiform, 

 disc finely alutaceous, moderately coarsely punctate, color yellowish with five 

 piceous spots usually more or less confluent ; scutellum black. Elytra scarcely 

 wider than the thorax, humeri rounded, umbone not prominent, surface closely 

 punctate, more finely at apex, color either entirely yellow or with the three pi- 

 ceous vittie, sutural, median and marginal, with intergrades. Epipleurte variable. 

 Body beneath entirely pale, except the sides and posterior portion of metaster- 

 num, which are brown or piceous. Abdomen shining, sparsely punctate, dis- 

 tinctly pubescent. Legs yellow, tibiae and tarsi piceous. Length .20— .30 inch. ; 

 5—7.5 mm. Plate V, fig. 8. 



This species presents two ultimate varieties, the vittate and the 

 entirely pale. In the vittate form the stripes are never sharply de- 

 fined, the median especially shading off indefinitely, while the sutu- 

 ral and lateral are often more like stains than vittai. 



