92 JOHN B. SMITH. 



In speaking of H. cynoglo.ssvm Hy. Echvards, in Pap. i, 103, Mr. 

 Butler says : " This species is nearly allied to the Texan insect to 

 which I gave the iiame of H. mefathetit;. It diflers in being slightly 

 smaller and with the external dark brown border of the primaries 

 of only two-thirds the width ; these appear to be the only noteworthy 

 distinctions between the two forms." 



Hab. — Texas. 



In the Belfrage collection, which formed a part of the collection 

 presented to the Museum by Prof Riley, I find a single specimen 

 fully answering Mr. Butler's brief characterization. As in Mr. But- 

 ler's specimen this also bears Mr. Belfrage's label Sesia axillaris, 

 making it almost certain that it is the same form sent Mr. Butler 

 under that name. This species is so close to thetis that I cannot find 

 any seizable distinctive features. The material, however, is too scant 

 to authorize a positive reference in this genus.* 



H. rubeiis Hy. Edwards, Tr. Cal. Ac. Sci. vi. 88, Hemaris; Grt., Buflf. Bull, iii, 

 220, Hemaris. 



Mr. Edwards gives only a comparative description of this form. 

 He says : " Under this name, if a true species, I wish to recognize 

 two specimens in my collection in which the ai)ical red mark is very 

 distinct above and below, the oblique scale patch at the base of the 

 primaries reddish and the costa and margins on the lower side also 

 Avith a decided reddish hue. In H. thetis the two preanal segments 

 alone are yellowish, but in the two sj^ecimens referred to above the 

 yellow is carried on to the third segment, dorsally and beneath, but 

 is interrupted on the sides by a black band. This appears to be a 

 strong character, as in my examples of thetis the yellow shade is dis- 

 tinctly confined to the two pre-anal segments. Slightly smaller than 

 thetis. The tuft of yellow hairs on the hind tibice is present in this 

 species. 



Hab. — Oregon, California. 



In the specimens examined by me the abdominal maculation is not 

 quite constant, though there are always more than two segments 

 yellow. The species looks quite distinct from thetis, and is a good 

 one I think. 



* A good colored fio^ure of H. metafhetis kindly .sent me by Mr. Butler proves 

 my identification correct, and makes it certain that it is a slight variation only 

 of H. tlietis. Maassen's reference of tlie species to axillaris is wild. 



