260 Bibliographical Notices. 



ated ; the enclosed space on the metathorax above transversely 

 striated, coarsely so in the middle, and finely so at the sides ; 

 beyond the space it is rugose ; the wings subhyaline, the ner- 

 vures black ; the coxse and trochanters black. Abdomen : the 

 base of the second joint of the petiole black. 

 Hah. Santiago. 



AmmopMla barbata. 



Female. Length 13-13? lines. Black ; the wings hyaline, 

 their apical margins fuscous beyond the apex of the marginal 

 cell, the fuscous border sharply defined. Head : the face and 

 cheeks with silvery pile, and covered thinly with long black 

 hairs. Thorax : very thinly covered with hoary pubescence ; 

 a silvery spot at the posterior margin of the prothorax ; the 

 tubercles, two oblique stripes at the sides of the thorax, and 

 the apex of the metathorax silvery ; the coxge, trochanters, 

 and femora beneath covered with changeable silvery pile ; 

 the prothorax coarsely transversely striated ; the mesothorax 

 with a central longitudinal impressed line, and transversely 

 and coarsely striated, the stria? punctured ; an elongate small 

 space before the scutellum punctured and withcfut striae ; the 

 scutellum longitudinally punctate-striate ; an elongate angular 

 space at the base of the metathorax rugose, on each side of 

 which is an oblique striation. Abdomen black, with a blue 

 tinge, the petiole two-jointed. 



Hab. Mexico. 



This species closely resembles A. gryphus of N. America, 

 California, and Texas ; but the prothorax is shorter, the sculp- 

 ture of the thorax coarser, and the insect much more pubescent. 



[To be continued.] 



BIBLIOGRAPHICAL NOTICES. 



Researches in Zoology. Illustrative of the Structure, Habits, and 

 Economy of Animals. By John Blackwall, F.L.S. London : 

 Van Voorst, 1873. 



That frequent inquiries should have been made for this book, 

 originally published in 1834, is, we think, sufficient proof, if any 

 were wanting, of its value, and fully justifies Mr. Blackwall in 

 issuing a second edition, "comprising," as he says, "such additions and 

 emendations as subsequent investigations have enabled me to effect." 

 For ourselves we have read through this work attentively, and have 

 been struck with the amount of careful observation it contains, and 

 still more with the wise caution exercised wherever any attempt is 

 made by the author to form conclusions from the facts observed. Take 



