181 REPORT ON ZOOLOGY, MDCCCXLIII. 



lellits, Duponch. (afterwards figured by Geyer as Cr. spuriellus), in the dunes of 

 Brittany ; the larva lives in that locality in a bag constructed of silk and sand, 

 on the roots of the Triticum. Zeller (Eut. Zeit. p. 142) has instituted a 

 new species of Crambus, named after the lady who discovered it, Mad. Lieuig, 

 Cr. Lienigialis, and native of Livonia. 



Id. (ib. p. 281) shows that Linnaeus had confounded two species under 

 T. xi/lostella, one of which, T. harpella, lives upon Louie, xylosteum, and the 

 other, T. xylostella of authors, to which Linnseus's description especially 

 applies, lives upon Cruciferaj. The author, on this account, proposes to 

 designate the latter as T. cruciferaruni, and to abolish the name xylostella 

 altogether. 



Depressaria gossypiella, a Moth injurious to the cotton-plants in India, is 

 described by Saunders. (Trans. Ent. Soc. iii, p. 284.) 



Doubleday (Dieffeub. Trav. ii, p. 288) mentions several new Tinea; from 

 New Zealand: Crambus ramosellits,Jlexuoselliis, vitellus; Argyrosetia stilbella 



DIPTERA. 



Loew (Ent. Zeit. p. 114) has communicated his observa- 

 tions on the nature of the so-called suctorial stomach (Saug- 

 magen) in the Diptera. 



The commonly -received opinion of Treviranus, that the organ in question 

 effected the absorption of fluid by means of rarefaction of the air, is most 

 decidedly rejected. Ramdohr had with greater probability indicated this 

 part to be an alimentary sac. In insects newly changed from the pupa the 

 author found it empty and contracted. It remains empty, also, when the 

 insect has taken food without eagerness ; but if it should previously have 

 fasted for some time, or if the food were particularly agreeable to it, not 

 only the stomach in the satiated insect, but also the so-called suctorial 

 stomach is found filled with food, either fluid, or consisting of pollen. 

 By compression of the abdomen, and probably, also, by the muscular power 

 of the walls of the sac, this nutriment is gradually forced back iuto the mouth, 

 and afterwards swallowed into the true stomach. Air is found but very 

 rarely, and as an exceptional case, in the so-called suctorial stomach.* 



Goureau (Ann. d. 1. Soc. Ent. d. Fr. 2 ser. i, p. 299) 

 has made experiments on the " poisers" (halteres) of the 



[* V. Hunter's experiments, described in Owen's Lectures on the Inver- 

 tcbrata, p. 219,] 



