THE CANADIAN ENTOMOLOGIST, 149 



bad condition are now before me, from Mungruba, Ceara, N. E. Brazil, 

 and from the Isthmus of Tehuantepec, Mex., coll. by Prof Suamichrast. 

 A figure, which has been overlooked, is given (1742) in Reaumur, Mem., 

 vol. 6, pi. 34, f. 15, and only mentioned, p. 386, as received from Hayti 

 by Mr. DuHamel. The figure, a male, is bad, but represents very proba- 

 bly the same species. 



The wings of A. fallax are much paler, less spotted, or not at all. 

 Otherwise, if my memory is right, they agree with A. Texana, at least 

 some small differences in Rambur's and Walker's descriptions seem to be 

 not important. If so, A. Texana would be only a northern, stronger 

 colored form of A. fallax. 



Though I have tried to separate carefully A. Americana from A. 

 Texana, the assumption that the first species may represent only a more 

 northern and strongly marked form of the latter one is very inviting. 

 Nevertheless I have before me the raised larva of A. Americana from 

 Florida, and the supposed larva of A. fallax from Victoria, Brazil. Both 

 seem to me different, and until now no other Brazifian species is known. 



5. Previous Stages of Acanthaclisis Americana. 



Larva full grown Head oblong, broad, the base covered by the pro- 

 thorax ; a little longer than broad, above flattened, below slightly convex- ; 

 sides a little curvate, so that the base is narrowed ; front margin notched ; 

 labrum nearly as broad as the head, on each side covering as a narrow 

 lobe the base of mandibles ; front margin with black bristles ; eye-cone 

 with six ocelli, and a seventh below the others among black bristles ; 

 antenna short, thin, with annulated joints, and a longer, cylindrical apical 

 one ; mandibles as long as the head, black, powerful ; basal half dilated 

 with three oblique strong teeth, separated, the basal one a little shorter ; 

 apical half curvated, pointed ; no interior bristles ; head above with short 

 hairs, directed to the front, on sides and below more numerous ; labial 

 palpi short, two cylindrical small basal joints ; apical as long as both 

 together, thicker, above triangularly dilated. 



Prothorax a little broader than head, above globose ; hind segment 

 short with two stigmata 3 the other parts ovoid, half as broad as long ; 

 mesothorax broadest ; scars as commonly ; first abdominal segment with 

 a dorsal stigma, the following ones lateral ; the segments with short black 

 lateral brushes ; abdomen above with black hairs on the transversal folds ; 

 last segmem: round, transversally split with numeious black thorns and 



