NORTH AMKKICAN LKl'I DOI'TICIIA. 81) 



No other compunitive description or synopsis of this group is given 

 by Mr. Grote, and he contradicts his conclusions and negatives the 

 vahie of one of his chief characters by classifying nitifoniiis and 

 floridensk, with entire margins, as varieties of thysbe with dentate 

 margins. As to fioridensis he revokes this determination, but leaves 

 uniformis as a variety, abandoning the principle. 



In vol. 2 of the same journal, p. 147, he gives a table of some spe- 

 cies of the other section as follows : 



Tcrniiiiiil band of primaries even on its inner edge feiiiiiit>. 



Terminal band interspaceably roundedly exserted on its inner edge... <liftiiii!!i. 

 Terniinal l)and dentate on its inner edge iiiargiiialJN. 



It may be noted here that the extreme western forms, as a rule, 

 differ from the eastern species in the thinner, more scanty vestiture, 

 and shorter, more slender palpi. They have a peculiar shaggy ap- 

 pearance, which is very characteristic. Some of the eastern forms 

 extend nearly to the Rocky Mountains, and retain their characters 

 quite constantly. None of the species of the^' section Hainorrhagla 

 extend beyond the Rocky Mountains, and the species are perhaps 

 best known. 



In the treatment of this genus, considering the scantiness of the 

 material at hand, I shall first give the descriptions, following Mr. 

 Grote's catalogue adding what notes I can, and will then add a 

 synopsis so far as I can make it up from the specimens at hand. 



It may be stated here that in " Can. Nat. and Geol." 1859, p. 122, 

 Dr. Gibbs records the fact that Semt thysbe emits a squeaking sound. 

 No one has since verified this observation. 



H. palpalis Grt., Buff. Bull, ii, 145, Hem arts ; Edw., Pr. Cal. Ac. Sci. v, 89, 

 JfeiHiiri.i ; Butl.. Trans. Zool. Soc. Lond. ix, 519, Hemaris. 

 Antennae black. Head above pale sulphnr-yellow, palpi briglit orange with 

 the tips black ; tongue black; breast and sides of thorax beneath the wings pale 

 sulphur-yellow. Thorax above, covered with olivaceous or rusty yellowish hair 

 extending over the dorsum of the abdomen. Abdomen black, with the pi'e-anal 

 segments tufted with light sulphur-yellow at the sides; anal hairs black. Legs 

 black. Wings pellucid with narrow blackish -brown terminal borders, on the 

 primaries even, inwardly a little irregular towards internal angle. Allied to the 

 eastern H. tenuis and differing from all the si)ecies by the discolorous labial 

 palpi. No ])erceivable reddish apical stain. Expands 1.85 inches; 46 mm. 



Hah. — Gilroy, Brit. Col. 



Of this species Mr. Edwards says (Pr. Cal. Ac. 8ci. vi, 89) : " Its 

 chief difftu-ence from thetis seems to be in the darker shade of the 

 labial ])alpi." 



TRANS. AMER. KNT. SOU. XV. (12) MAY, 1888. 



