338 [June, 



Missouri. Dr. Engelmann ; two specimens. From the difference between these 

 specimens, the variations in this species must be very great. One has the pos- 

 tjrior angles of the head entirely black, while in the other there are merely in- 

 distinct black dots : there are also two black dots between the antennae. The 

 neck has a single spot on the middle, instead of two lateral spots as in C. myla- 

 brina ; the thorax, besides the four spots arranged transversely, has an apical 

 spot each side ; the disc is transversely concave before the middle; the basal 

 spots of the elytra are sometimes confluent ; the medial spot is njuch larger than 

 in C. mylabrina. The under surface is variegated with black and yellow ; the 

 margin of the segments of the abdomen, and usually the whole of the last seg- 

 ment being yellow. Outer spur of the posterior tibiae cylindrical and obliquely 

 truncate. 



A specimen from the Creek Boundary, given me by Dr. S. W. Woodhouse, 

 differs from the two original specimens in having the head unspotted ; the elytra 

 more finely and less densely punctured, the postpectus entirely rufous, and the 

 feet colored as in C. mylabrina ; the head, however, is somewhat quadrate pos- 

 teriorly, and the spot on the neck is medial ; the middle spot of the elytra is large. 

 I have therefore placed the specimen under C. Engelmanni, though it may pos- 

 sibly be a distinct species ; a much larger series of specimens will be necessary 

 to determine the value of the characters above mentioned. 



26. L. Germari, capite parce punctato nigro, macula verticali magna flava, 

 thorace elongato, flavo nigro biguttato, elytris confertim punctulatis, sutura vit- 

 taque lata nee humerum nee apicem attingente nigris; scutello nigro, pedibus 

 flavis, genubus tibiarum apice tarsisque nigris. Long. 32 '47. 



Haldeman, Proc. Ac. Nat. Sc. 1, 303. 



Pyrota Germari Le Conte, Journ. Ac. Nat. Sc, New Ser., 1, 91. 



Baltimore and North Carolina ; Mr. Haldeman. The black sutural margin is 

 dilated anteriorly, and frequently separated from the other portion, forming an 

 elongate spot ; the vitta is narrowest towards the base ; the body beneath is 

 black ; the outer spur of the posterior tibiae is more obliquely truncate than in 

 the two preceding species, so as to become flattened and concave. 



27. E. d i s c o i d e a, flava, capite punctato, thorace elongato, nigro biguttato, 

 apice angustato, elytris subtiliter scabris macula subbasali, vitta utrinque ab- 

 breviata, suturaque angustissima nigris, pectore, genubus, tibiarum apice, tarsis 

 palpis anteniiisque nigris. Long. -27 45. 



One specimen, found on the Pldtte river by Wm. Tappan, and given to me by 

 Prof. Agassiz ; several found in Texas by Lieut. Haldeman. Head yellow, con- 

 vex, broadly rounded behind, not densely punctured, pilose, with short, erect 

 hairs: palpi black. Antennae black, base testaceous ; longer than the head and 

 thorax, tilil'orm, less slender than in the preceding species, joints loosely articu- 

 lated, 11 th not constricted. Thorax narrower than the head, one half longer 

 than wide, narrowed at the apex, transversely impressed before the middle, 

 basal margin impressed at the middle, with a few scattered hairs, punctured, 

 bright yellowish testaceous, with discoidal round black spots at the middle. 

 Scutellum yellow. Elytra yellow, with a small, oblong, black spot near the 

 scutel, and a moderately wide, black vitta reaching neither the base nor the 

 apex; the extreme sutural margin is also black; the surface is rough, with fine 

 wrinkles, scarcely punctured. Postpectus black, abdomen yellow; feet yellow, 

 knees, tips of the tibiae and tarsi black; posterior tibiae with the outer spur 

 cylindrical and obliquely truncate. 



B f. 



28. L. puncticollis, nigra, minus dense nigro-pilosa, capite thoraceque 

 onfertim punctatis, hoc elongato, subcanaliculato, apice angustato, elytris sca- 

 bro-punctatis. Long. '36 45. 



Epicanta pitnctieollls Mannerheim, Bull. Mosc. 1813, 288 : Le Conte, Ann. 

 Lye. 5, 162. 



San Diego and San Francisco, California; abundant. This species differs from 

 the next in having the thorax more densely and less coarsely punctured; the an- 



