618 REVIEWS. 
in the Lymexylon and Hyleceetus; in the Hymenoptera ver in the Diptera (Enant 
The dimorphism in the Dipterous genus hasia, discove oew, is very remarkable. 
thong seen fy ae onec I may be permitted to add here a ae communication by Mr. 
oe ent t some ye = ago ma still kanvipquasr ^ti E m "o gems "— "em spors 
laf, 
nd more colored, d ame the body more color ed. The tw forms fly at the Terg time and 
unite with tħe same form of females. The genital parts of pang lar: es are in shape and 
m Menon with Those or the — m secs There exist — Waca forms e WM 
Isay seems, because I have never seen a male whieh I hesitated to 
Lived in - or the two nos? 
f di variable in t 
Pichena: ABA and genera is the m ode of Hosting even from that Publier n the Asa 
cidz. Perhaps a closer examination will disclose even gome di: Ference, in me. pamal paria 
certain dim Mti insects. s 
distinct species, will be hereafter recognized as only —€ variations, Still, it is ate 
that very different facts are to-day united under the same na of dimorphism. 
sere nty the eaae of a di imorphism in another part or ven PL viz.,in the Crus- 
au iv WOII. 
E LIFTED AND SUBSIDED ROCKS OF pa ICA.* — The author’s name 
is well known from his admirable paintings and portraits of Indian life 
and physiognomy. Catlin’s * North American Indians," was one of the 
wonder books of our childhood and youth, Sharing the interest of Irving's 
Astoria, Cooper's Leather Stocking Tales, and Tanner's Narrative, those 
y boy delights in 
reading ; and leading them all in careful detail, arid distinguished from all 
in rich, pictorial ébsitfioue t. 
We turn with a de egree of sadness to the present little volume, and 
wonder how the author could have brought himself to publish such scien- 
tific nonsense. The author has been a great traveller over the American 
Continent, on both hemispheres. He has studied the faces and habits of 
o 
noes, the floods moving northw and thus forming the Gulf-stream. 
Such a “cataclysm of the bete ah " adiri disturbed the minds of the 
J 
elevated waters, the Gulf-stream first bursting out of the sunken Gulf of 
oe pnto Poeta erige n 
* By George Catlin. London, Trubner & Co. 1870. 12mo, pp. 228. 
