110 MACROGLOSSA RUFICAUDIS. 



I am not disinclined to believe that Enficaudis is but a form of Thysbe, as one of my examples of the former is plainly though 

 not deeply dentate on the inner edge of marginal band of primaries. This marginal band can scarcely be of much value specifically as 

 in another example of i?»/caudis it is not widened perceptibly in the middle, but its inner edge runs in a regular line nearly as in 

 Gracilis, but in tlie wliite anterior and median legs, and all other particulars, it agrees with the many other examples of Rnjicaudis be- 

 fore me. 



In another example of Thysbe the interspaca) points of inner edge of marginal band are exaggerated to such an extent that one 

 of them reaches to the discoidal cell : in this example the marginal band is of great width, as are also the brown basal parts, leaving 

 comparatively little vitreous space. 



MACROGLOSSA ^THRA. Strecker. 



Described on p. 107. 



(PLATE XIII, FIG. 2.) 



MACROGLOSSA FUMOSA. Streckkr 



Described on p. 93. 



(PLATE XIII, FIG. 3.) 



I have nothing to add to the original description of these two insects, save the figures on the present 

 plate. 



MACROGLOSSA FLAYOFASCIATA. Barnston. 



Walker, C. B. M„ Yol. VIII, p. 87 (1856). 



Clemens, N. Am. Sph., Jnl. Acad. Nat. Sc, Phila., p. 131 (1859). Morris, Cat. Lep. N. Am., p. 17 (1860) ; Synopsis Lep. N. 

 Am., p. 151 (1882). 

 Lepisesia Flawfasciata, Grole, Proc. Ent. Soc, Phila., Vol. V, p. 39 (1865); Bull. Buff. Soc. Xat. Sc, Vol. I, p. 17 (1873), Vol. II, 

 p. 225 (1875). Grote & Rohinstm, Proc. Ent. Soc, Phila., Vol. V, pp. 149, 171 (1865) ; List Lep. X. Am., p. iii (1868). 



(PLATE XIII, FIG. 4 ?.) 



Expands nearly If inches. 



Head and thorax above yellow ; palpi black at sides, yellowish beneath ; abdomen black, yellow on basal 

 segment, and yellow lateral tufts on last segment; anal brush black ; legs and under surface of body black, 

 a yellow spot on middle of last segment. 



Upper surface; primaries blackish, with a broad paler sub-terminal band and black discal spot. Secon- 

 daries bright yellow, black at base, and with an even, not broad, black margin. 



Under surface: submarginal band sparingly scaled, space inlerior to this ochraceous, marginal band 

 blackish ; costa edged with black. Secondaries same as above, but yellow median space much paler, and 

 inclined to ocliraceous, also a yellow spot at base. 



Habitat. Canada, Mus. Am. Ent. Soc. ; Holyoke, Mass., Mus. Strecker. 



The ornamentation of the wings is the only point wortliy of note in which this species differs from others of the genus Macro- 

 glossa; superficially, the wings liave more the appearane of Pterogon. 



Grote, in erecting his genus Lepisesia, speaks of it as : "A genus hitherto confounded with Macroglossa, but more nearly allied 

 to Sesia, from which, however, it is quite distinct." Were he to use the term Sesia in its correct sense, the alliance would be exceed- 

 ingly slight ; indeed would extend only to the fact tliat in many species of both genera the wings are hyaline ; but in using the term 

 Sesia, he alludes to the clear-winged species o( Macroglossa, such as Difinis, Bdl., etc, to which Flavofasciala is certainly allied, as it be- 

 longs to the same genus. The grounds for separating it therefrom, as designated by Grote, are entirely too weak to be of .any value." 



"Head smaller and more obtuse than in Macroylossum." Smaller than M. Stellaterum it certainly is, and so is the whole insect, 

 but than M. Croatica it is just as certainly not smaller, but the same in size ; as are also Bombyliformis, Fuciformis, and the other clear- 

 winged species. Neither can I see that the head is more obtuse than in those mentioned, though it is more so than in M. Thysbe. 

 Nor can I see, after careful measurement, that "the eyes are smaller, compared with Sesia," (as he calls the clear-winged species of 

 Macroglossa;) compared with Thysbe they are larger, taking the relative size of the two insects into consideration. 



"The anterior wings are relatively much longer, narrower, external margin more oblique than in Macroglossum ;" he should 

 have added Stellaterum, but agreeing in this with M. Croatica. 



"The costa is medially depressed ;" so is it, more or less, in over half of the examples of Macroglossa that I possess, both opaque 

 and clear-winged. 



"The sub-costal nervure is curved upward, beyond the discal cell ;" so it is in Croatica and some examples of Thysbe, AociUaris 

 and others. 



"The posterior wings are small ;" no smaller than in Croatica, Axillaris and Fuciformis ; larger than in Bombyliformis. 



"First, second and third median nervules less propinquitous than in Macroglossum ; more curved ;" I cannot see that these ner- 

 vules are further apart tlian in Croatica, Bmnhyliformis and others. 



"The abdomen is more smoothly scaled and less obtusely terminated than in Sesia ;" not more smoothly scaled than in Thysbe, 

 Axillaris, Bombyliformis and Croatica ; more smoothly scaled than Fuciformis and Rujicaudis, 



