CALIFOKNIA ACADKMV OF S(M KNCKS. oT 



show tliat \vliii-]i may oasil\- be inferriHl from its ^(Mioral ap- 

 pearance, \'i/r. that it is iiiiieh move nearly relatctl to Litlio- 

 charis and its allies than it is to Scopaais. It should, in 

 fact, in a systematic arrangement of our Pa'derini, iminedi- 

 atelv precede ('ah)derma which it resembles in its 4-dentate 

 labrum, and from wliich it is distinguished, as before i-e- 

 marked, by its strongly inflated tliiid maxillary palpal joint, 

 and also by its elongate })rothorax and short basal joint of 



the }»osterior tarsi. 



III. 



A considerable number of new genera having been de- 

 scribed since the publication of the Classification of tlu^ (N)l- 

 roptera of North America by LeConte and Horn, I would 

 ])ropose the following as a substitute for tlu^ one given in 

 that Avorlv, page 'JO, for tlioso Paxleri which liave the; fourth 

 tarsal joint simple. 



It will be; noticed that, in the following table, th<>genicu- 

 lation of the antennio is considered of secondary import- 

 ance when c()m])ared with other characters. Although this 

 geniculation varies greatly in amount, I have yet failed to 

 observe a single spindes of North American Panlei-ini in 

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

 fore merel\- one of degr(!e and is only of im])ortance when 

 ])resent in its extreiiu^s. There is. howev<>r, a mai'ked dit'l- 

 erence in the natui'e of the geniculation. In IIesperol)ium, 

 and ]H-()bably also Ababactus, the dee]) emargination at tlu^ 

 n])0\ of the scape which receives the s(H'ond joint when 

 flexed, is at tlui antisrior portion of the apex, so that tlu^ 

 funicle is bcnit to tlu; front, while in the second section this 

 emargin;ition is at the back of the ai)ex, so that when llexed 

 the funich; ])roj(!cts ))osteriorly. It is also to be noted that 

 the geniculation of the antenna' lU'evailing in the Piederini 

 is not lik(3 that to be seen in some other groups of ('oleo|)- 

 tera, where tin; s(H;ond joint is })laced almost immovaltly at 

 an angle with the scape, and wliicdi could a[)pro|)riateiy 

 be termed fitjldl/j ijcnlcnUde. In this grcjup the funicle is 



