54 



Exhibitions. 



Mr. Stevens exhibited a box of insects received from Mr. Bales, containing a beau- 

 tiful series of Micro-Lepidoptera from the Upper Amazon ; and some fine Coleoptera 

 taken by Mr. A. R. Wallace in Amboina, amongst which were Euchirus longimanus, 

 some new and beautiful species of Buprestidte and Anthribidaj, a magnificent new species 

 of Batocera, and a fine Prionus also new to Science, 



Mr. Pascoe has furnished the following diagnoses of two fine longicorns in this 

 Collection : — 



Monohammus Grayii. M. aterrimus ; prothorace antice, elytrisque fasciis quatuor, 

 et macula basali hirtis, ochraceis, his chalybeo-alris, nitidis, parce punctatis. 

 Long. 13 lin. 



Dixi in hon. J, E. Gray, Ph.D., Ent. Soc. Lond. Prseses., &c., &c. 



Agnia fasciafa. — A. aterrima ; elytris parce punctatis, fasciis quatuor hirtis, 



ochraceis. Long. 9 lin. 

 Precedenti facie simillima, sed Agnia, Netvin., genus bene distinctum, pertinet. 



Mr. Janson exhibited a series of Symbiotes latus, Redfenhacher [Faun. Austr. 1st ed. 

 198, 184 (1849), 2nd ed. 371, 382 (1857), Gerstaecker, Mon. Endora. 400, 1 (1858)] 

 illustrating the variations in size and colour to which this species is subject. These 

 specimens were captured by himself, within the London district, on the 30th of June, 

 14th of July, and on the 8lh and 29th of August, 1858, and, as previously stated, in 

 localities upwards of a mile apart. He remarked that he had experienced no difficulty 

 in determining, within a few hours of first meeting with this insect, the genus to which 

 it pertained, the analytical method pursued by Dr. Redtenbacher, in his admirable 

 work above cited, and the clearness and precision of his generic characters, affording 

 peculiar facilities to the student ; but having advanced thus far, safe progress was inter- 

 dicted, for, although Dr. Redtenbacher's description of S. latus satisfactorily applied, in 

 most respects, to the insect before the Meeting, two, apparently important, discrepancies 

 presented themselves, namely, that of his S. latus the author distinctly says that the 

 thorax has " the upper surface smooth, shining, not punctured" and " the interstices 

 between the striae of the elytra not punctured" whereas, in all the individuals of the 

 insect under consideration, the prothorax is conspicuously, although minutely and 

 sparsely, punctured, and the insterstices of the elytral striae present numerous irregularly 

 disposed punctures, very evident throughout the basal moiety, but obsolete on the apical 

 half. Under these circumstances he had considered it right to defer bringing the 

 insect before the Society until he had ascertained its legitimate appellation, for which 

 purpose he had intended to transmit specimens to Vienna on the first opportunity 

 which should present itself. In the meanwhile, however, Dr. Gerstaecker's valuable 

 ' Monographic der Familie Endomychidse,' Berlin, 1858, came to hand, in which the 

 genus Symbiotes is treated, and the species fully described, and at once all doubt as to 

 the identity of our insect and S. latus, Redt., was dispelled. As the present insect so 

 closely resembles in its facies the common Mycetsea hirta, Marsh., Steph., that it may 

 be very pardonably confounded with it (its usually larger size and more parallel elytra 

 might perhaps betray it), the following comparison of the characters of the two nearly 



