<« J. B. SMITH. 



from it by the humeral spot of the elytra. One specimen only ; 

 Coll. Dr. Horn. 



4. A. sericea Mann. Bull. Mosc. 1S43, 288; luleipennis Lee. Ann. Lyceum 

 Nat. Hist. N. Y. v, 157. 



A specimen of this species sent me by Dr. LeConte, does not agree 



with the description of the species, and appears to be a specimen of 



A. rufa. I have seen no specimen to agree with the description. 



5. A. flavipemiis Hald. Journ. Ac. Nat. Sc. Phila. New Series, i, 100. 

 Common in northern N. Y. In the Adirondack Mts.. I found it in 



company with A. rufa, though by no means as common. The difference 

 between this and the foregoing is very slight indeed, and a large, series 

 of sericea may prove its identity with this species. 



6. A. rufa Say, Journ. Ac. Nat. Sc. Phila. v. 244, [Mordella) ; pallescens Mann. 

 Bull. Mosc. 1843, 288 ; ventralis Mels. Pr. Ac. Nat. Sc. Phila. ii, 312 ; filiformis Lee. 

 Agassiz L. Sup. p. 231 ; nigriceps Lee. Pr. Ac. Nat. Sc. Phila. xiv, 45. 



Rather a variable species, as appears from the synonomy ; nigriceps Lee. 

 differs only very slightly in the color of the head from the typical rufa, 

 and is at the most a local variation. I have collected many hundreds 

 of this species, and- have them from a pale yellow to a dark fuscous, 

 although I have none with the head deep black. Dr. LeConte's type 

 however, which he kindly sent me, does not quite agree with his remark 

 " head black, it is more nearly piceous. 



7. A. pusio Lee. Pr. Ac. Nat. Sc. Phila. 1858, 7ti. (PI. I, fig. 19). 

 The smallest of our species, presenting nothing noteworthy. 



8. A. COllaris Lee. Ann. Lyceum N. H. N. Y. v, 157. 



Readily distinguished by the combination of colors of thorax and 

 elytra. I have seen hut very few specimens, and these presented 

 nothing peculiar. 



MORDELLINI. 



Hind femora very large and flat ; metasternum short : hind tibia 

 dilated; claws cleft to the base, and strongly pectinated; last dorsal 

 segment conical, prolonged, sixth ventral not visible; eyes oval, emar- 

 ginate ; antennae more or less serrate, inserted in front of the eyes, under 

 a frontal margin ; body pubescent, very finely punctulate. 



I have been unable to find any consistent external sexual characters 



TOMOXIA Costa. 

 A true' MordeKifJ genus, and differing from the genus Mordella 

 principally by the eyes, which do not reach the occiput. The parts 

 are figured PI. I. tigs. 22—26. 



