Palaeomaclius anglicus and Palooophonus caledonicus. 673 



middle of scutellum shining and irapunctate; area of meta- 

 thorax triangular, plicate basally, and with a long median 

 plica (thus essentially as in Melitta altissima) ; anterior 

 basitarsi with dense orange-fulvous hair within, the other 

 basitarsi with the same, but redder on hind ones; third s.m. 

 shaped as iu DulicochUe and Melitta americana ; apical 

 plate of abdomen with basal half finely densely punctured 

 and with no keel. It is doubtful whether the subgenus 

 Brachycephalapis can be maintained; the insect really is 

 nearer to typical (European) Melitta than is M. americana. 



LXXV. — The Holotypes of the Fossil Scorpions Palfeo- 

 machus anglicus and Palseophonus caledonicus. By F. A. 

 Bather. 



(Published by permission of the Trustees of the British Museum.) 



1. PalcEomachus anglicus (II. Woodward). 



;Mr. R. I. POCOCK (1911, Palseonf. Soc. Monogr. Terrestrial 

 Carbcnit'erous Arachnida, p. 16) has founded a new genus 

 of scorpions, Palceomachits, for the reception of Eoscorpius 

 anglicus, H. Woodward (1876, Quart. Journ. Geol. Soc. 

 vol. xxxii. p. 58), no similar species being known. Further, 

 Mr. Pocoek has selected as the holotype of this species the 

 chela fiom the Coal-Measures of Skegby New Colliery, near 

 Mansfield, Notts, which was the original of Dr. Woodward's 

 plate viii. figs. 3, 3 a {op. cit.), and is preserved in the Geolo- 

 gical Department of the British Museum (regd. I. 99Ia). 

 In relabelling and remounting this specimen for exiiibition 

 I had the curiosity to compare it with the figures of those 

 t\\o authors, but the matrix with which so much of the fossil 

 was still obscured, both in the relief and in tiie counterpart, 

 prevented me from recognizing the structures represented by 

 them. On clearing away the matrix — a delicate and lengthy 

 but not in other respects a difiicult task — the whole outline 

 of the chela was brought to view, and proved very different 

 from that hitherto imagined. 



The proximal segment preserved — the trochanter, with a 

 width of 4*6 mm. and a length of 3'2 mm. — is much more like 

 the same segment in Scorpio ofer, as figured by Dr. H. 

 Woodward {tab. cit. fig. 4), than it is like that authoi-'s 

 representation of it (fig. 3). Its posterior or outer portion 

 is marked by a deep wide groove (appearing as a ridge in the 

 fossil). 



