98 . [April, 



which Sir John Lubboct thought might be stridulating organs in Lasius Jlavus were 

 not really such, but merely a portion of the general sculpture of the surface. Dr. 

 Sharp said that the sounds produced were of the greatest delicacy, and Mr. Goss 

 had been in communication with Mr. W. H. Preece, F.R.S., with the view of ascer- 

 taining whether the microphone would assist the human ear in the detection of 

 sounds produced by ants. Mr. Preece had stated that the microphone did not 

 magnify, but merely i-eproduced, sound. A long discussion ensued, in which the 

 President, Canon Fowler, and Messrs. Champion, McLachlan, Goss, Hampson, 

 Barrett, Jacoby, and others took part. 



Mr. C. J. Gahan read a paper, entitled, " Notes on the Longicornia of Australia 

 and Tasmania, Part I ; including a list of the species collected by Mr. J. J. Walker, 

 E.JSr., and descriptions of new forms." — H. Goss and W. W. Fowler, Eon. 

 Secretaries. 



SEMIPTERA-HETER OPTEEA 



COLLECTED BY J. J. WALKER, ESQ., E.N., F.L.S., AT GIBRALTAR, 



AND IN NORTH AFRICA. 



BT EDWARD SAUNDERS, P.L.S. 



The following list o£ the species of Hemiptera-Seteroptera col- 

 lected by Mr. Walker has been awaiting publication for some time; 

 it is, as will be seen, very rich, except in the Family Capsidce, the 

 species of which do not fall so frequently under the notice of a 

 Coleopterist, and are very difficult to preserve, unless set immediately 

 after capture. Mr. Walker succeeded in obtaining three undescribed 

 species, as well as a great many which are very rare in collections ; 

 a few species in this list will be found also recorded in Ent. Mo. 

 Mag , vol. sii, p. 80, but although they did not form part of this 

 collection, I thought it would be well to include them here, so as to 

 make the list as full as possible. The character of Gribraltar, as 

 a good entomological locality, is well sustained by the Hemiptera, but 

 I have sought in vain in the boxes for the best known member of the 

 Family. All are from Gibraltar, except where the locality is given. 



PENTATOMID^. 



Solenosthedium lynceum, Fab., 1 specimen. Odontotarsus grammicus, Lin. a 



few specimens ; caudatus, 3 specimens. Psacasta oerinthe, Fab., also from Tangier, 



on Boi'aginaceous plants ; tuberculata, Rossi. Eurygaster maura, Lin., common ; 



hotentotta, Fab., common, 1 from Tangier and 1 from Benzus Bay, Marocco ; maroc- 



cana, Fab., also from Tangier. Odontoscelis dorsalis, Fab., 2 specimens ;j^w%inosa, 



Linn., common on the neutral ground in roads, &c. Ancyrosoma albolineatum, 



Fab., a few specimens. Graphosoma semipunctatum, Fab., on UmbeUiferce ; line- 



atum, Linn., also from Tangier, and Benzus, Marocco, on Umbelliferce. Podops 



dilatata, Put., several. Cephalocteus histeroides, Duf., not uncommon at roots of 



