1863.] 
95 
and cited by authors as the Americano rum of Fabricius, but De Geer 
described it two years previously under the name of Pens^hanica,^ as 
having the scutellum and the first segment of the abdomen all yellow, 
while that of Fabricius had those parts apparently all black. However, 
the series of specimens which I have examined show that they are one 
species, and that the color of the scutellum and the first segment of the 
abdomen vary very much in the mixture of black and yellow. The 
most abundant variety is intermediate between that of the He Geer and 
Fabricius, it having the scutellum and the first segment of the abdo¬ 
men more or less mixed with yellow. Olivier was the only one who 
suggested that He Geer’s species was a variety of Americanorum^ and 
yet, for some unknown reason, he allowed the latter name to remain. 
No one since Olivier seems to have taken any notice whatever of He 
Geer’s species, nor of Olivier in placing it as a synonym of America- 
noTum. 
Two fine 9 specimens from Florida vary in having the first segment 
of the abdomen above jet-black, with a small patch of yellowish in the 
middle of the posterior margin of the segment. 
12. B. sonorus. 
Bomhus sonorus Say, Bqst. Journ. Nat. Hist, i, p. 413. 
“ Body yellow; head black; thorax with a broad black band in the 
middle ; wings violaceous-blg,ck; tergum with the first, second and third 
segments yellow, with others black; beneath black. Length 9 four- 
fifths of an inch. Inhabits Mexico.” 
Besembles the fervidus Fabr., so closely that it may readily be 
mistaken for it, but that species has only two segments of the tergum 
clothed with yellow hair; that of the second one, however, is so much 
elongated as to conceal a considerable portion of the next segment. 
The color is a much deeper yellow than that of fervidaA 
Unknown to me. Say is certainly mistaken in stating ilvrit feroidus 
has only two segments of the abdomen yellow; it has the first four 
segments yellow. 
13. B. Arcticus. 
Bomhus Artticus Kirby, Sujjpl. Parry’s 1st Voy. p. ccxvi. Curtis, Eoss’ 2 ik 1 
Voy. Append, p. Ixir. (1824.) 
? Apis alpina 0. Fabr. Fn. Greenland, p. 199. (1780.) 
Female. Body covered with long black hairs, but those that clothe 
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