OF THE MALTESE ISLANDS. 77 



abdominal segments. Thorax with two tubercles on each side, the anterior one 

 bearing two or three long slender spines. Abdominal segments each with one 

 (possibly two) extremely minute tubercles at the apex of which is a minute 

 broad flat spine ; those on the 7th and 8th segments more conspicuous 

 than the rest ; but all of these processes are so minute as to be easily overlooked. 

 Wing-sheaths pointed apically and extending subventrally as far as the base of 

 the 7th abdominal segment. Head distinctly elongated and somewhat triangular 

 in outline ; in the empty pupa this often breaks away in the process of mounting 

 when the outline may be seen to bear a striking resemblance to the head of an 

 ox in miniature (PI. I, fig. 13). Antennal sheaths distinctly segmented, lying 

 curved behind the eyes and subsequently following the costa of the wing-sheath. 

 Palpal sheaths originating near the centre of the frons, extending backwards and 

 then curving suddenly forward so that the apex rests against the antennal sheath 

 and lies pointing in the same direction. Legs extending slightly beyond the 

 wing sheaths. 



Achiowledgments. 

 The Liverpool School of Tropical Medicine is much indebted to the Tropical 

 Diseases Research Fvmd (Colonial Office) for the Grant of £100 towards defray- 

 ing the cost of the expedition, and to the representatives of the Moss Steam Ship 

 Company for granting a free passage by their boats. I wish also to express my 

 thanks for assistance rendered in the furtherance of the objects of the Expedition 

 by His Excellency tlie Governor and Commander-in-Chief, General Sir Leslie 

 Bundle, K.C.B., K.C.M.G., D.S.O., &c., who very kindly gave permission to 

 visit all Government lands and Institutions and also sanctioned the use of the 

 Laboratory at the Public Health Department ; to the Honourable E. C. Roupell, 

 D.S.O., Acting Lieutenant-Governor for much valued assistance and kind 

 hospitality ; to the officials of the Civil, Naval and Military Departments ; to 

 the Hon. C. Caruana Scicluna, Chief Government Medical Officer, and the 

 members of his staff, especially to Professor T. Zammitt, who furthered the 

 work of the expedition in every possible way ; to the officers of the Royal Army 

 Medical Corps, Captain Babbington, Captain Lloyd-Jones, Captain Steward, 

 Captain Beaman, and especially to Captain Marett for placing the whole of his 

 valuable material in my hands for examination ; to Major G. S. Crawford, 

 R.A.M.C., I am also specially indebted for valuable aid and for his kind 

 hospitality ; to Major F. L. Dibblee, Royal Marine Artillery and Mrs. Dibblee 

 for collecting extensive series of material for investigation ; to Surgeon Lancelot 

 Kilroy, H.M.S. Diana, for examples of Simulium from Crete; to the Govern- 

 ment Veterinary Officer, Dr. A. M. Macfarlane, for a valuable collection of 

 Helminths and other intestinal parasites for demonstrative and other purposes 

 in the Laboratory and Museum of the Liverpool School of Tropical Medicine. 



List of References. 



1. Annandale (N.) 



Records of the Indian Museum, Vol. V, pt. 3, nos. 13 & 14. 



2. Birt (C.) " Phlebotomus Fever in Malta and Crete." 



Journal of the Royal Army Medical Corps, 1910, Vol. XIV, pp. 236-258, 



