NORTH AMERICAN COLEOPTERA. 181 



1. <E. gibbitarsa Say. — Oval, sli^litly oblong, moderately convex, honey- 

 yellow, elytra brilliant cobalt-blue or green, thorax with four piceous spots, often 

 more or less confluent, tibise and tarsi piceous. Anteunse scarcely half as long 

 as the body, piceous. Frontal carina very flat, two feeble tubercles, not trans- 

 versely impressed between the eyes, a few punctures in a transverse row, others 

 near the eye, vertex and occiput smooth. Thorax more than twice as wide as 

 long, gradually arcuately narrowed from base to apex, margin moderately ex- 

 plauate, but not translucent, surface smooth, with four piceous spots, the middle 

 pair larger, more or less confluent ; scutellum black. Elytra slightly wider at 

 base than the thorax, humeri obtuse, umbone moderately prominent, smooth, 

 surface sparsely indistinctly punctulate, epipleurse concolorous. Abdomen shin- 

 ing, sparsely punctate with very sparse short hairs. Length .18 — .28 inch. ; 

 4.5 — 7 mm. 



This species shows no great variation ; sometimes the thoracic 

 spots are confluent in a broad transverse band. The elytral varia- 

 tion from bhie to green is usual in that color, and it has been ob- 

 served that the more northern specimens are the more green. 



Occurs from the Middle States to Missouri and Texas. 



2. CE. flavocyanea Crotch. — Form rather broadly oval, subdepressed, 

 shining, bright yellow, thorax with a discal spot, elytra violet-blue, the entire 

 margin pale. Anteunse half as long as the body, third and fourth joints about 

 equal, piceous, three basal joints testaceous, terminal joint usually paler than 

 those which precede. Head reddish yellow, frontal carina tuberculiform, the 

 tubercles distinct, vertex coarsely, closely and deeply punctured, especially near 

 the eyes. Thorax more than twice as wide as long, sides arcuately narrowing 

 to the front, the margin moderately wide, especially in front, not translucent, 

 base nearly regularly arcuate, the usual sinuation near the angles scarcely evi- 

 dent, surface sparsely, but very distinctly jiunctate, color yellow, with a median 

 piceous spot, sometimes forming a very broad transverse band. Elytra not wider 

 at base than the thorax, humeri obliterated, umbone scarcely prominent, disc 

 indistinctly sparsely punctate near base, almost smooth at middle, a region of 

 coarse punctures beginning at the base just within the umbone, extending one- 

 fourth the length of the elytra; epipleurse yellow, the inner half piceous at the 

 dilated basal portion. Body beneath entirely yellow, abdomen shinitig, very 

 indistinctly sparsely punctate. Legs yellow, the anterior and middle pair 

 slightly darker. Length .20 — .24 inch. ; 5 — 6 mm. 



This species has much the form and general coloration of gibbitarsa, 

 but may be distinguished by the entirely pale lateral border of the 

 elytra. The discal black spot of the thorax does not seem to be 

 made up of the union of many, but is unique. 



Occurs in Texas. 



3. <E. (Iiora(*ica Fab.- Oblong oval, feebly convex, reddish yellow, elytra 

 piceous with blue, violaceous or slightly greenish lustre, the sides narrowly mar- 

 gined at basal half with pale. AntenuiB half as long as the body, piceous ; third 

 and fourth joints equal. Head pnle, occiput bordered with piceous, frontal 

 carina obtuse, tubercles distinct, surface rather coarsely and closely ininctate. 



