;02 THE CANADIAN ENTOMOLOGIST. 



while I hope to get it all straightened out, and I am glad that my original 

 proposal to separate first the species of Agrotis with unarmed tibi« has 

 been adopted in his revision by Dr. Smith. I may say, in conclusion, 

 that it is the property of all changes in the synonymy, whether proposed 

 by me or by Prof. Smith, that they should be verified and that they are 

 subject to examination. I have been showing reasons why some of Prof, 

 Smith's changes are not to be followed. 



A MEXICAN ALEURODICUS. 



BY T. D. A. COCKERELL, MESILLA, N. M. 



Aleurodicus Dugesii, n. sp.— Length, ifi mm.; length of anterior 

 wing, 2}( mm.; its greatest breadth nearly i]'^ mm. Pale grayish- 

 ochreous, covered with white meal, abdomen beneath shining silvery. 

 Wings white; upper wings iridescent, with markings similar to those of 

 A. ornatHs, but very pale gray and quite different in detail. There are 

 four gray bands crossing the wings, of which only the third and fourth are 

 joined by a longitudinal band. The first (basal) band bends abruptly 

 inwards after crossing the main nervure, which branches so near the base 

 of the wing that there are practically two nervures, the first gray band 

 failing in the angle between them, but strong again beyond the second. 

 Second gray band broad as far as the first nervure, just beyond it 

 interrupted broadly, but continued as a large, nearly circular, gray patch, the 

 greater part of which is above the second nervure, and passing thence as 

 an oblique narrow band to the margin. Third band resembling the 

 second as far as the first nervure, which it meets at its fork ; after that 

 failing, but reappearing strongly a little way down the lowest branch of 

 the nervure and thence passing downwards, becoming very faint. Fourth 

 band broad, passing across the end of the fork, bent inwards, joining the 

 continuation of the third band after the break, itself forking at its lower 

 end. The curve of the fourth band leaves a white apical area in which 

 there is a gray spot. There is also a gray spot at the tip of the second 

 nervure. 



The pupje occur on the under sides of the leaves and are of the usual 

 type — oval, flat, pale ochreous, with white mealy powder. 



Habitat. — Guanajuato, Mexico, on Hibiscus rosa-sinensis. Sent by 

 Dr. Alfred Duges in great quantity. Dr. Duges writes that it is also 

 found on the large-leafed Begonia and other plants, and it does not 

 appear to do them a great deal of harm. It is the first Aleurodicus 

 described from Mexico, and is most nearly allied to the Jamaican^. 

 ornaius, Ckll. The genus now includes five species, all neotropical 

 except the U. S. A. asarumis (Shimer, 1867). 



