On the Jurassic Dipteron, Platyura fittoni. 269 
Coxze all ochreous. Wings perfectly clear. Wing-length 
6 mm. 
Type a single male presented by the collector, Mr. G. V. 
Hudson, to the Cambridge Museum in 1911, and by Dr. H. 
Scott to the British Museum in 1922. The specimen bears 
the number 136, but no data. 
Canthyloscelis nigricoxa, sp. n. 
Antenne black. Eyes of ¢ just touching. Thorax 
brownish, unstriped. Legs uniformly ochreous-brown except 
for the paler base of the hind femora and the shining black 
hind coxe. First hind tarsal joint somewhat swollen, only 
about three times as long as its greatest breadth, and slightly 
shorter than the second joint. Wings with a dark subapical 
patch on the costa, not reaching the hind margin, Wing- 
length 7°5 mm. 
Type a single male presented by Mr. Hudson to the 
Cambridge Museum in 1911, and by Dr. H. Scott to 
the British Museum in 1922. The specimen bears the 
number 136a, but no data. Mr. Hudson informs me that 
his first specimen of this genus was taken at Castle Hill, 
West Coast Road, South Island, N.Z., in January 1893. 
This may be the specimen he refers to. 
XXXIV.—A Note on the Jurassic Dipteron, Platyura fittoni, 
Brodie. By F. W. Epwarps. 
(Published by permission of the Trustees of the British Museum.) 
Praryvra Firronr was named and badly figured by Brodie 
(Fossil Ins. pl. ii. fig. 9, 1845) from a specimen in the 
British Museum from the English Purbeck rocks. In 1856 
Giebel (Ins. d. Vorwelt, p. 209) proposed the generic name 
Adonia tor Brodie’s figure. This name having been previously 
used, Handlirsch (Fossil Ins. p. 629, 1906) proposed to 
replace it by Pseudadoma. Later, Johannsen (‘ Genera 
Insectorum,’ Mycetophilide, p. 84, 1908), still without 
examining the type-specimen, placed Adonia and Pseudadonia 
as synonyms as Mycetophilites, Forster, an Oligocene genus 
for which no type-species has been named. 
During a recent investigation of the fossil Culicids in the 
