24 ENTOMOLOGICAL NEWS. [Jan., '04 



but do not disappear ; the abdominal marks are contiguous 

 with the base of the segments, thus leaving a dark space be- 

 tween themselves and the apical margin. 



MonardcB differs from Cockerellia Ashmead in having all 

 claws of the male cleft. Both species are thinly pubescent 

 with whitish hair. Monard(Z y^SlS captured August ir, 1901, 

 by the writer, the species being abundant at the flowers of Mo- 

 narda pu7ictata. Gerhardi was taken August 28, 1903 Per- 

 dita odomaculata, Say, was taken on Aster^ Big Timber Creek, 

 New Jersey, September 22, 1901, and on Solidago, Lawndale, 

 Pennsylvania, September 15, 1901, by the writer. 



Southwestern Geographical Names. 

 By T. D. a. Cockerell 



I have lately received two very excellent papers — one by 

 Mr. O. A. Johannsen, on Aquatic Nematocerous Diptera, and 

 the other, by Mr. A. L,. Melander, on Mutillidse — both con- 

 taining erroneous interpretations of Spanish-American geo- 

 graphical names. I would not offer any criticism at this time, 

 were it not that the errors are by no means new, the literature 

 of American entomology being scattered with them, so it be- 

 comes necessary to present some sort of a protest. 



(i) Arroyo. This is the name universally used in the south- 

 west for a dry watercourse ; that is, one which is occupied by 

 water only after heavy storms. Professor Townsend collected 

 a large number of insects in an arroyo near I^a Luz and Tula- 

 rosa, New Mexico ; and the records of these are getting into 

 the literature. In a paper of mine in the Annals and Maga- 

 zine of Natural History, the word arroyo is followed by a 

 comma, which was not in my MS., the printer evidently think- 

 ing it the name of a town. But in Mr. Melander's Mutillidae 

 paper I am horrified to see numerous species reported from a 

 place designated "Arrogo, New Mexico" ! This paper has 

 several other names of localities spelled wrongly ; but this is 

 the characteristically persistent error. 



(2) Baja California. " Baja, a place in California," has 



