550 Mr. O. Thomas on a 



Hcdictus cariniventris flavotectus, subsp. n. 



$ . — Head and tliorax somewhat more robust ; mandibles 

 red in middle ; abdomen above more densely pubescent, 

 with bright yellowish hair hiding the surface. Wings 

 slightly greyish. 



QueUa, India, July 1903 {Nurse). 



The specimen of H. cariniventris, Morawitz, used for com- 

 parison was collected at Buda by Friese, May 29, 188G, and 

 was referred by him to that species witli some doubt. 

 Morawitz described the species from the male, collected in 

 Turkestan ; in 1895 Dalla Torre and Friese recorded it from 

 the Caucasus. I have not been able to see any Asiatic 

 material of true cariyiiventris, and it is possible that when, 

 females are obtained in Turkestan, they will prove identical 

 with the duett a form. 



Compared with H. vestitus, Lep,, jiavotectus is easily 

 distinguished by being much larger and more robust, with 

 yellow instead of white tomentum on abdomen. The meso- 

 thorax and scutellum are yellow-green, while in vestitus they 

 are dark blue-green. 



Megachile marginata. Smith. 



I saw the type (?) at Oxford. There is a strong band 

 of tomentum in scutello-mesothoracic suture ; abdominal 

 bands very light and distinct ; eyes light red ; ventral scopa 

 black on last segment and fuscous on apex of penultimate 

 one. 



LVII. — A new Species of Mastacomys//*o??i a Cave in South 

 Australia. By Oldfield Thomas. 



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



Among some rodent-remains found in guano-caves in S.Aus- 

 tralia, presented to the Museum by Prof. Wood-Jones, and 

 illustrative of his paper on the molar roots of Muridse, there 

 occurs the upper jaw of a Mastacomys — a genus as yet only 

 known from one Tasmanian example, the type of AJ.fuscus, 



