PROCEEDINGS OF THE SOCIETY. 791 



allocated to the Ordinary Meetings of the Society, the idea being that 

 Fellows interested in either of these subjects could get into touch with 

 each other, and would find opportunities for bringing forward new work 

 which might afterwards be communicated to the Society. He asked all 

 those present who took any interest in either of these matters, and would 

 like to join either of the sections mentioned, to signify their desire to the 

 Secretary. They wanted to start as soon as possible, because there were 

 a large number of Fellows who took an interest in one branch of Micro- 

 scopical Science only, and who consequently had small opportunity of 

 discussing that at an Ordinary Meeting, where perhaps only one of the 

 other subjects was brought forward. 



The following Instruments, Objects, etc., were exhibited : — 



Mr. C. L. dirties (C. Baker) : — Trypanosoma Brucei under a new 

 T V m - achromatic oil-immersion objective. Auxiliary Illuminating 

 Lens in illustration of Mr. Nelson's paper. 



Mr. T. H. Powell :— ^-in. apochromatic homogeneous-immersion objec- 

 tive of 1 • ;-55 N.A. 



Mr. W. "Wesche : — The following slides in illustration of his paper — 

 Trophi of Asilus from Pegu. The Labium has been separated, at 

 the base of the hypopharynx and maxilla3 is the pharyngeal pump ; 

 Proboscis of Blow-fly, CaUiphora erytliroeephala, dissected and sepa- 

 rated, the labrum, hypopharynx, stipites and cardines of the maxilla 

 and the submentum adhere together ; Trophi of Oulex aimulipes, 

 the pharyngeal pump is seen in the interior of the head ; Culex 

 pipiens, the pharyngeal pump is seen in the interior of the 

 head ; Dissected trophi of Empis livida, the pharyngeal pump is 

 seen immediately behind the hypopharynx ; Dissected trophi of 

 Hmnatopota italica 9 , blood-sucking fly ; Labium of Hylos 

 femoratus, to show the " taste-cups," rare on the trophi of Diptera ; 

 Dissection of trophi of Leptis conspicua, to show the imbedded 

 mandibles and the character of the tracheas, occasionally a blood- 

 sucking insect ; Proboscis of Pliora concinna ; Proboscis of Prosena 

 sybarita, one of the specialised forms in the Muscidaj, the trophi 

 are specialised for flower-feeding ; Proboscis of Siphonia geniculate, 

 trophi specialised for flower-feeding ; Tipula oleracea, the labella 

 and maxillary palpi, at the base is the pharyngeal pump ; Proboscis 

 of Zodion cinereum, one of the Conopoda3, with trophi modified for 

 sucking the nectary of flowers. 



