J. CHESTER BRADLEY. 101 



THK EVANIII)^, EXSIGIV-FMES, AX ARCIIIAC 

 FA,niL,Y OF IIY.UKKOPTFKA. 



(Plates V-XY.) 

 BY J. CHESTER BRADLEY. 



When in the fall' of 1901 I published in the Transactions of 

 the American EntomoJogical Society a paper on the Aulacin^e of 

 North America,* I intended it as the first one of a series of three 

 papers, which I expected shortly to complete, one on each subfamily 

 of the Evaniidie. Through many intervening circumstances this 

 'sign has been frustrated, but out of it has grown the present 

 ■aper. 



This contribution deals primarily with the Evaniinse, and con- 

 tains as complete a monograph of the North American species of 

 that subfamily as I have been able to prepare. But I have found a 

 study of exotic genera and species necessary to a satisfactory con- 

 cept of the classification and relations of the group. Indeed, the 

 variations of form shown by the members of this group and tlieir 

 comparison with each other and with other groups, native and 

 exotic, has been to me the most interesting part of the work, and I 

 trust that I may be pardoned if I have laid more stress on it than 

 is customary in purely systematic works, where often little attention 

 is paid to characters not found desirable for use in keys. 



As a second part of this paper I have embodied the result of my 

 study of exotic forms. Here are included descriptions and remarks 

 on the genera and species of the world, a table to the genera, and 

 finally a table to all the described species whose generic position I 

 could with reasonable certainty identify. The latter have been 

 compiled almost entirely from literature, which is I believe the only 

 practicable method, because no one person can expect to accumu- 

 late even a large proportion of the species of the world. These 

 certainly must prove unsatisfactory, and must contain many errors, 

 for the descriptions are often very incomplete, and it is difficult to 

 compare those drawn uj) by different authors. But I hope that 



* Trans. Amer. Ent. Soc, xxvii, p. 319. 



TRANS. AM. KNT. SOC. XXXIV. (13*) APRIL. 1908. 



