from the Rio Xuutluj .State of Vera Cruz. 279 



to me as authority, while in my paper I stated that it was 

 foiinil "over the ea-itt-rii half or more of the United States 

 ami in Mexico." He has still further, in the same manner, 

 given New Mexico as a locality for Ori//>tera dosiades. The 

 paper of mine referred to (" Notes on North -American Tachi- 

 iii(hi', I.," Proc. Eiit. Soc. Wash.ii. p|). 181—140) was puljlished 

 while 1 was in Washington, and all of my specimens therein 

 mentioned, unless otherwise .stated, were taken in the District 

 of Columbia. These errors of hjcality should not be per- 

 petuated, as they are very misle.iding with regard to the 

 geographical range of species. No specimen of Trichopoda 

 lias ever been known, by any chance wind or shift of fortune, 

 to occur in New Mexico ! Neither does the genus Ocyptera 

 occur there to my knowlege. 



N.B. — It should be pointed out that in Bellardi, Sagg. 

 Ditt. ^less., and Osten Sackcn, Biol. C.-A., Dipt., the locality 

 Cuautla is wrongly spelled, the mistake being doubtless due 

 to the printers and proof-readers. The mistake has eveu 

 become incorporated into dipterological nomenclature, in the 

 name Daaypogoti rjKintlensis, Bell. (Ditt. Mess. ii. p. 67). 

 The specitic name should be amended to cuautlensis. Cuautla 

 is pronounced Kiuah-oot'-lah. 



39-40. Trichopoda pennipes. 



Typical form and var. pilipes, Fabr. 



I refer here twenty-four specimens, sixteen males and eight 

 females, all San Rafael, March 9 to July 18. All except 

 the March 9 specimen (male), and one June 18 (male), were 

 taken on flowers of the Cordia, sp., from June 30 to July 18. 



Length of males 6^ to 11 millim., of females 7 to 

 10 millim. 



Notwithstanding the great variation in size, as well as 

 considerable in wing-coloration, I must locate all of these 

 specimens in this species. The form without yellow on the 

 wings may be continued for the present as a variety under 

 the name pilipes, Fabr., the description of which applies well. 

 This is ajjparently the form which recent writers (Roeder, 

 Wulp, and Giglio-Tos) have referred to under the name 

 pyrrhogaster^ Wd., which I consider a synonym of jnlipesj 

 Fabr. The proper separation of pennipes and pilipes can be 

 known only by the capture iii coitu of numerous specimens 

 of both forms. 



Nearly all of the present specimens have at least a tinge 

 of brown on the tip of the abdomen, but this cannot be said 

 to be general in either sex. The colour of the scutelluni 



