CALIFORNIA ACADEMY OF SCIENCES. 37 



show that which may easily be inferred from its general ap- 

 pearance, viz: that it is much more nearly related to Litho- 

 cliaris and its allies than it is to Scopf^us. It should, in 

 fact, in a systematic arrangement of our Pa^derini, immedi- 

 ately precede Caloderma which it resembles in its 4-dentate 

 labrum, and from which it is distinguished, as before re- 

 marked, by its strongly inflated third maxillary palpal joint, 

 and also by its elongate prothorax and short basal joint of 



the posterior tarsi. 



III. 



A considerable number of new genera having been de- 

 scribed since the publication of the Classification of the Col- 

 roptera of North America by LeConte and Horn, I would 

 propose the following as a substitute for the one given in 

 that work, page 99, for those Psederi which have the fourth 

 tarsal joint simple. 



It will be noticed that, in the following table, the genicu- 

 lation of the antennae is considered of secondary import- 

 ance when compared with other characters. Although this 

 geniculation varies greatl}' in amount, I have yet failed to 

 observe a single species of Nortii American Paederini in 

 which it is not more or less manifest; the character is there- 

 fore merel\- one of degree and is onlj'of importance when 

 present in its extremes. There is. however, a marked diff- 

 erence in the nature of the geniculation. In Hesperobium, 

 and probably also Ababactus, the deep emargination at the 

 apex of the scape which receives the second joint when 

 flexed, is at the anterior portion of the apex, so that the 

 funicle is bent to the front, while in the second section this 

 emargination is at the back of the apex, so that Avheu flexed 

 the funicle projects posteriorly. It is also to be noted that 

 the geniculation of the antennae prevailing in the Paederini 

 is not like that to be seen in some other groups of Coleop- 

 tera, where the second joint is placed almost immovabl}" at 

 an angle with the scape, and which could appropriately 

 be termed vujidly r/euiculate. In this group the funicle is 



