1854.] 



1G1 



10. L. Mozardi, rufa, nitida, thorace latitudine longiore, convexo, parce 

 punctulato, lateribus late rotundatis, elytris cyaneo-nigris, punctato-striatis, ab- 

 dominis segmentis ultimis tribus antennis pedibusque nigris, femoribus basi 

 rufis. Long. -22 -31. 



Latreille, Gen. Crust, et Ins. 3, 66. Olivier, Ins. 88, tab. 1, fig. 3. Say. Am. 

 Ent. 3, tab. 39. 



Middle, Southern and Western States ; not rare. This species has the antennae 

 rather stouter than the others of this division, and the fifth and sixth joints are 

 a little rounded ; the seventh joint is a little smaller than the 8th, which is also 

 a little smaller than the ninth. By these characters it forms a transition towards 

 L. trifasciata, of division (B.) 



11. Trogossita ? angustata Beauvois, Ins. d' Afrique et d'Amer. 125, tab. 

 32, fig. 2. 



12. L. b r e v i c o 1 1 i s, Randall, Bost. Journ. Nat. Hist. 2, 48, and 



13. L. inornata Randall, ibid, from Massachusetts ; are unknown to me. 



Triplax Payk. 



I continue to retain Tritoma united with this genus, as the slight difference in 

 form will by no means warrant their separation. The differences in the antennae 

 cannot be considered as of greater value, since in neither of the groups are they 

 persistent ; finally, the last joint of the maxillary palpi is more transverse in the 

 genuine Triplax, being about three times wider than long, while in Tritoma the 

 breadth is only double the length. For convenience in determining the species 

 they may be arranged in several divisions. 



A. Corpus elongato-ovale ; palpi maxillares articulo ultimo latitudine triplo 

 breviore ; tibiae anticae haud dilatatae. 



* Antennarum articulo 8vo praecedenti simili. 



1. T. festiva Lacordaire, Mon. Erotyl. (1842,) 208. Lee. Journ. Acad. 

 Nat. Sc. 2d ser. 1, 71. T. fasciata Mels. Proc. Acad. Nat. Sc. (1847,) 3, 176. 

 Southern States, rare. 



2. T. m ac r a, elongata, elliptica, rufa, nitida, thorace latitudine duplo bre- 

 viore, antrorsum angustato, lateribus fere rectis, dorso subtilius parce punctato, 

 elytris nigris subtiliter striato-punctatis, interstitiis vix parce punctulatis, an- 

 tennis nigris thorace non brevioribus, articulo 3io sequenti sesqui longiore. 

 Long. -24, (lat. 10.) 



One specimen from Maine, given me by Prof. A. Guyot. Proportionally much 

 narrower than the next species, which it resembles in coloring, but is distin- 

 guished by the thorax being less punctured and not narrowed anteriorly ; by the 

 striae of the elytra being impressed, by the interstices having no distinct punc- 

 tures, and by the antennae being entirely black. 



3. T. thoracica Say, Journ. Acad. Nat. Sc. 4, 89. Lee. ibid. 2d ser. 1, 71. 

 T. melanoptera Lac. Erotyl. 215. 



Georgia, New York, Lake Superior. In some specimens the thorax is nar- 

 rowed from the base ; in others the sides are parallel from the base nearly to the 

 middle; this difference is probably sexual. 



4. T. californica, elongato-ovalis, antennarum basi, pedibus, capite tho- 

 raceque rufis, hoc latitudine plus duplo breviore fortius punctato, a basi antror- 

 sum angustato, lateribus rectis, elytris fortius seriatim punctatis, striis subim- 

 pressis, interstitiis parce punctulatis. Long. *15 '18. 



San Jose, California. Somewhat less convex than the other species, and di - 

 tinguished from the next, which it resembles in color, by the 8th joint of the 

 antennae being similar to the seventh. From that, as from all others of division 

 (A,) it is known by the coarser punctuation and by the very straight sides 

 of the thorax. 



14 



