100 . [May, 



to my great disappointment I found neither Andricus ostreus nor 

 Dryophanta longiventris would attempt to deposit eggs on them, nor 

 would they condescend to remain on the trees. 



It appears to me that those buds which are converted into galls, 

 and remain on the tree some time, as well as those formed on the bark, 

 leave behind them something objectionable to gall-flies ; but this is 

 certainly not the case when the galls are produced on the catkins and 

 leaves, which soon drop to the ground. 



Dr. Adler mentions that in carrying on his experiments with 

 breeding gall-flies on small oak-trees in pots, he often could not 

 induce flies to deposit eggs ; was it because the trees had borne galls 

 the previous year ? 



Stonehouse : April Ith, 1898. 



DIAGNOSES OF SOME NEW AEADID^. 

 BY E. BERQKOTH, M.D. 



Full descriptions of the following species will be given in 

 another place. 



Peoxius gtpsatus, n. sp. 

 Suhovato-elongatus, castaneus, sed maxima parte crusta cretacea 

 ohvolutus ; capite superne area triangulari caelata instructo, antennis 

 capite vix longiorihus ; loho antico pronoti medio caelamine antice for- 

 titer dilatato et in duos lohos divaricatos diviso supra basin capitis 

 producto instructo, loho postico pronoti vestimento cretaceo destituto, 

 exceptis lateribus ex parte carinulisque nonnullis disci ; caelatura 

 T -for mi et marginihus lateraUbus scutelli incrustatis. 



Long., ? , 4, 3 mm. 

 Venezuela. 



NANNIUM, n. g. 



Brachyrrhyncho affine genus, sed spiraculis, inprimis segmentorum 

 posficorum, ad margines laterales abdominis valde approximatis. 



Species huj us generis sunt omnes mi?ioris maqnitudinis Jiahitu sim- 

 iles, capite lato, antennis brevibus, Jiarum articulo secundo brevi, 

 pronoto basi subtruncato, membrana albo-livida fuscovenosa prcsditoe. 



Typus : N. parvum. 



N. PAEYUM, n. sp. 



Oblongum, retrorsum leviter dilatatum, fusco-nigrum, margine api- 

 cali segmentorum connexivi angusta rufescente ; articulo primo anten- 

 narum dimidio suo apicem capitis superante; lobo antico pronoti lateribus 

 angulato dilatato et rejlexo, lobo postico crista transversa undulata 

 instructo. I^ong., ^, 3 mm. 



Venezuela. 



