10 Journal New York Entomological Society. [Voi. vil 



A. opacula Lee, Proc. Acad. Sc. Phil., 1859, p. 69. 



I have seen nothing just like the Leconte type, which however 

 seems to have been collected in alcohol and has not, perhaps, quite its 

 normal appearance. The specimens which Horn mentions from Ari- 

 zona are quite surely distinct from the type, and are described above 

 under the name disjuncta. The character given in the table for the 

 separation of opacula and amabilis is the one given by Horn. This 

 difference is evident enough in the types, but there is scarcely any- 

 thing in the descriptions to support it, and I cannot think it of much 

 value in itself. We must wait for more specimens. Length, 10.5 

 mm., .42 inch. 



Habitat: Texas (El Paso). 



A. amabilis Horn, Trans. Am. Ent. Soc, VH, p. 7, PI. I, Fig, 3. 



The relation of this species to opacula is alluded to above. As 

 compared with amplicollis it is decidedly more slender, with the thorax 

 less narrowed in front. The marginal thoracic stripe is very narrow ; 

 the apical ventral plate is strongly rounded or subangulate, with free 

 edge inclined to be a little irregular. The markings do not vary much 

 in the specimens before me and are well represented by Horn's figure. 

 The apical band is always red in great jDart. Length, 8-1 1 mm., .32- 

 .44 inch. 



Habitat : New Mexico and Arizona. 



Taken by Prof. Snow in some numbers in the Magdalena Mountains, 

 of New Mexico, and a considerable series has lately been received from 

 southeastern Arizona by Mr. Daggett. 



A. vc\^cV2i Horn, Trans. Am. Ent. Soc, VII, p. 8, PL I, Fig. 5. 



As remarked by Horn, this species is more strongly arched when 

 viewed in profile than any others except alacris and comata. It most 

 nearly resembles serena in color, but that species is spotted (not fas- 

 ciate), and with different thoracic margin. The apical plate is en- 

 tirely wanting in all specimens seen, a character quite unusual in this 

 section. Length, 7.5-11 mm., .30-. 44 inch. 



Habitat : Texas. 



A. robusta Horn, Trans. Am. Ent. Soc, VII, ^). 9, PI. I, Fig. 7. 



I have seen only the two specimens from which the description was 

 drawn. The side margin of the thorax, visible only posteriorly when 

 viewed from above, combined with the presence of the yellow spot on 

 the inferior margin of the thorax distinguish the species from any 



