108 THE CANADIAN EXTOINIOLOGIST. 



general consensus of opinion is that it should be placed in the family 

 Derodontidas. Some of the more important nomenclatorial changes noted 

 are as follows : Monophylla Spin, takes the place of Macrotehis Klug ; 

 our two species of ColypJms (furcatus Schaeff. and melanopterus Dury) 

 are referred to Derestefius Chevr.; Tarsostenus Spin, and Phyllohc^fius 

 Spin, are removed from the subfamily Clerin^ and assigned to the sub- 

 family CoRYNETiN.E. Clertis Fabr. is retained for the American species, 

 usually known as such, but for which Prof. Chas. J. Gahan proposed the 

 name Efioclems, our species not being congeneric with the type of Clerus 

 — the European C. mutillarins. 



The letterpress is excellent ; the mistakes are few and mainly unim- 

 portant, several of these being clearly chargeable to the typographer. 



A. B. WOLCOTT. 



MEIGEN 1800 ONCE MORE. 



The supreme importance of the subject in the nomenclature of 

 Diptera seems to justify a further comment on my part, although the mere 

 difference of view between Mr. Coquillett and myself would not in itself 

 require notice. 



The decision of the Commission is that Meigen 1800 was actually 

 published, therefore available if "found valid." Mr. Coquillett omits the 

 word "found," which, to my mind, changes the meaning somewhat. The 

 process of '-finding" is what Mr. Stiles leaves to specialists, and as far as I 

 am eligible to express an opinion under that head, I have already indicated 

 that I have no use for Meigen 1800. I have had considerable corre- 

 spondence with the publishing dipterists of the country in the last few 

 weeks on the subject, and I have yet to find a single one of them who 

 agrees with Mr. Coquillett, that Meigen 1800 should be allowed to take 

 precedence over Meigen 1803. 



To illustrate the point that there is a good deal at stake, I might 

 mention Mr. Coquillett's two papers on the types of genera in Empididae. 

 About seven years ago he published a paper on the subject, applying the 

 rules of the International Zoological Congress \ lately, in his work on the 

 types of all the North American genera of Diptera, he necessarily passed 

 over the same field again, this time adopting Meigen's 1800 names. I 

 have taken the trouble to count up the North American species of 

 Empididae that have their generic names changed in the later paper, and I 

 find that they comprise no less \\\2iW forty -five per ce?it. of the family ! 



J. M. Aldrich, Moscow, Idaho. 



Erratum. — Can, Ent., XLIII, p. 51, line 4, for ''k long du'' read 

 "longe le." 



Mailed March iith, 191 1. 



