228 Geological Society. 



the fifth short and broad, and the sixth broad and long, 

 followed by a yellow spot ; there are also two short trans- 

 verse yellow bands at the back of the pectus. Legs black ; 

 cox93 red ; front trochanters and femora yellow beneath. 

 Abdomen black ; the basal segments banded and striped with 

 yellow, varied with red ; the others with long yellow dorsal 

 stripes, as far as the 7th segment, where the stripes, which 

 are separated by the dorsal carinas, are most conspicuous ; 

 anal appendages of male as long as the 8th segment, the 

 lower one not much shorter ; upper ones black ; lower one 

 red, black-pointed, nearly as long as the upper ones ; append- 

 ages of the second segment of the abdomen small. Wings 

 of a slightly yellowish hyaline, stained with saffron at the 

 extreme base of the hind wings ; pterostigma brown, slightly 

 inclining to yellowish between the nervures : fore wings 

 with thirteen or fourteen antenoclal and nine postnodal ner- 

 vures, the last nodal and the first two or three postnodals not 

 continuous, nodal sector slightly waved before the middle ; 

 triangle traversed, followed by three rows of cells, increasing 

 towards the hind margin ; three post-triangular cells : hind 

 wings with nine to eleven antenodal and nine or ten post- 

 nodal nervures ; membranule of moderate size, grey. 



Much resembles a species which I have just described from 

 St. Vincent (and var. ? from Grenada), West Indies, under 

 the name of D. multipunctata ; but in that species the mark- 

 ings differ somewhat, and the frontal tubercle is always 

 violet-blue, whereas it is concolorous in D. Broadwayi. 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



June 20, 1894.— Dr. Henry Woodward, E.R.S., 

 President, in the Chair. 



The following communications were read : — 



1. ' The Bargate Beds of Surrey, and their Microscopic Contents.' 

 By Frederick Chapman, Esq., F.R.M.S. (Communicated by Prof. 

 T. Rupert Jones,. F.R.S., F.G.S.) 



This is an attempt to correlate the Bargate Beds of Guildford and 

 its vicinity with the members of the Lower Greensand as known 

 elsewhere in the S.E. of England. 



1. The strata at Littleton quarry, near Guildford, are described 

 in detail ; the remanie fossils, oolitic ironstone, and other material 

 derived from older rocks are noticed ; the abundant occurrence 

 of Ostracoda and Foraminifera in a particular clay-band is noted, 



