CEDEMERID^E OF BOREAL AMERICA. 399 



This is, however, an error of observation, which, had it 

 been true, would ally Copidita more closely with Ditylus. 

 Copidita as above constituted will contain the follow- 

 ing species: — 



Last joint of maxillary palpus cnltriform; widest near base. 2. 



Last joint of maxillary palpus triangular; widest near apex. 3. 



2. — Antennas fusco-testaceous. 



Elytra pale or fusco-testaceous. quadrimaculata. 



Antennre black. 



Elytra imicolored; legs black. 



Thorax red with basal black spots. notoxoides. 



Thorax reddish, immaculate. thoracica. 



Elytra with suture and margin pale. 



Thorax piceous at sides; head more or less pale. suturalis. 



Thorax reddish yellow, paler at apex and base; head black. 



mime tic a. 

 3. — Thorax decidedly broader than long; elytra nearly black 



without metallic lustre. obscura. 



Thorax not wider than long; elytra blue. 



Thorax reddish. bicolor. 



Thorax black. cyanipennis. 



Entire body and legs fusco-testaceous. fuliginosa. 



In the above list all the species excepting the last three 

 have the antennae inserted close to the eyes. 



Copidita quadrimaculata Motsch. (Probosca) Etudes, 

 1852, p. 78; (Nacerdes) Bull. Mosc. 1853, p. 267; 

 Lee. New Species, p. 166. 

 Elongate, brownish, testaceous. Antennae pale. Head 

 yellowish, the occiput more or less piceous, surface punc- 

 tate. Thorax longer than wide, sides arcuate in front, 

 sinuate posteriorly, base slightly explanate ; surface 

 densely punctate with a fine smooth median line, color 

 reddish yellow with three piceous spots in a transverse 

 row, another near the base. Elytra finely and densely 

 punctate, finely pubescent, indistinctly subcostulate. Body 

 beneath in great part piceous. Legs pale, the knees 

 piceous. Length .52-. 06 inch. ; 13-16. 5 mm. 



