1 893-] ENTOMOLOGICAL NEWS. 1 63 



Tine Kntomological Section 



ACADEMY OF NATURAL SCIENCES, PHILADELPHLA. 



PROCEEDINGS OF MEETINGS. 



March, 23, 1893. 



In the absence of the Director Dr. Horn, Mr. Ridings was called on to 

 preside. Members present: Calvert, Ridings, Laurent, Skinner. Associ- 

 ates; Westcott, Fox and Boerner. Mr. Calvert presented to the collection 

 of the American Entomological Society a 9 Fons Colombia vinosa Say, 

 and a Trithemis umbrata. The latter species he said was a Tropical 

 American one, and that the male has a band across the wings, but the 

 present specimen, a $, also has the band. It is only the second such 

 female the speaker had ever seen. The question of secondary' sexual 

 characters was referred to by Mr. Calvert, and further discussed by the 

 members present. Mr. Fox called attention to and exhibited a new 

 genus of Fossorial Hymeoptera. He stated that it was related to 

 Diiietus, Gastrosericus and Astatus. From the two first mentioned 

 genera it differed by the middle tibiae having two spurs at apex, and from 

 Astatus by the eyes of the ^ being separated on the vertex. In conse- 

 quence of the two spurs on the tibiae he had decided to call it Diploplectron. 



Henny Skinner, Recorder. 



The following papers were read and accepted by the Committee for 

 publication in Entomological News : 



The Puparium and Pupa of Subula pallipes Lw. 



By C. K. Tyler Townsend. 



The descriptions which appear below are drawn from a pupa- 

 rium and pupal skin, from which issued a specimen of Subula 

 pallipes Lw. The fly was bred by Prof C. P. Gillette, at Fort 

 Collins, Col., from maggots and puparia found under bark of 

 Cottonwood (/*^/!>2^/z/j' sp.). 



The pupa is enclosed in a puparium formed of the old larval 

 skin. The puparium splits dorsally on the median line down to 

 the posterior portion of the fifth segment, where the integument 

 breaks laterally on each side, to allow the partial escape of the 

 pupa, the head segment having previously become wholly or 

 partly detached. The pupa works itself more than half way out 

 through this opening, and there remains. The fly then escapes, 



