No. VIII.— DIPTERA, PHORID^ FEOM SEYCHELLES. 



By James E. Collin, F.E.S. 



(Plate 5.) 



(Communicated by Prof. J. Stanley Gardiner, M.A., F.R.S., F.L.S.) 



Read 1.5th June, 1911. 

 Chonocephalus Wandolleck, Zool. Jahrb. Syst. xi. 428, 1898. 



1. Chonocephcdus similis Brues, Ann. Miis. Nat. Hung. iii. 554, 1905. 



$. Brues described this species from a single male collected at Matheran, Bombay, 

 India, and there is little to add to his description except that I believe the mesopleura 

 bears a few hairs, the hypopygium also bears a number of longish hairs each side curving 

 downwards and inwards. The middle tibiae often appear to be flattened and of a whitish 

 colour (possibly only the result of immaturity). 



?. Very similar to Brues' figure of C. kihoshoensis, the whole insect being of a 

 chestnut brown colour, darker about the hind margins of the abdominal segments and 

 paler about the centre of frons ; the legs yellowish. The pubescence of the arista is much 

 longer than in Brues' figure and the eyes slightly larger ; the bristles on the abdomen are 

 not limited to the hind margins of the segments. The pubescence on the frons is rather 

 longer round the antennal fovese, one especially long hair being placed above the antennal 

 fovea in front of the eye, and another one below this fovea almost in front of the eye but 

 slightly lower. The palpi bear a long hair at the tip. 



Chonocephalus mexicanus Silvestri (Boll. Lab. Zool. della Scuola d'Agric. Portici v. 

 172, 1911) agrees in the chsetotaxy of the head and in general coloration with the above 

 females and may represent the same species. 



Locality. Silhouette: from near Morne Pot-;i-eau, about 1500 feet, on rotting fruit, 

 VIII. 1908 (eleven females). Mahe : Cascade Estate, about 800 feet and over (fourteen 

 males, one female). 



Also known from India (Matheran, near Bombay). 



2. Chonocephalus sp. 1 $. 



A headless male specimen from Mah^, Cascade Estate, about 800 — 1500 feet, 1909, 

 must belong to a different species ; the mesopleurse are bare, the basal pair of scutellar 

 bristles are reduced to fine hairs, the wings are longer, the subcostal vein does not fade 

 away but ends in the costa, and all the thin veins are very distinct, the first thin vein 

 being distinct right back to its origin at the end of the cubital, the second thin vein is not 

 so straight and ends at a point less than a third the distance from the end of the first to 

 SECOND SERIES— ZOOLOGY, VOL. XV. 14 



