AUCHMEROMYTA LUTEOLA 



considerable space. The proboscis is folded beneath the head into 

 a deep groove. The palpi are club-shaped, with a long, yellow, 

 flattened third joint, which carries an arista with black hairs on its 

 upper and lower borders. 



The dorsum of the thorax is marked by longitudinal black and 

 brown stripes, and shows a well-marked transverse suture. The 

 squamae are large, yellow 

 in colour, and cover the 

 halteres. The first abdo- 

 minal segment has a 



narrow dark line pos- 

 teriorly, the second a 

 central median dark line, 

 which joins with a pos- 

 terior dark line. The third Fig. 442. — Auchmeromyiajuteola: Larva. 

 segment is dark brown, (X3-) 

 except for a narrow yellow 



anterior streak. The fourth segment is dark-coloured, with a 

 posterior light brown band. The fifth segment is small, and con- 

 tains the genital apparatus. 



The legs are bufi-coloured, with black hair and bristles. The 

 fifth tarsal joint is jet black, and has a large cream-white pulvillus. 



Life-History. — The fly deposits its eggs on the ground of the hut, 

 especially on spots on which urine has been voided. The larva is 

 semitranslucent, of dirty white colour, acephalous and amphi- 

 pneustic, and has eleven distinct segments. The first segment is 

 divisible into two portions, of which the anterior carries the mouth- 

 parts. The broadest segments are the ninth and tenth. There are 

 distinct dorsal and ventral surfaces, at the junction of which in each 

 segment there are protuberances, with a spine and a pit. The 

 ventral surface is fl^attened, and has three footpads transversely 

 arranged at the posterior margin of each segment. The last seg- 

 ment is large, and carries the posterior spiracles and the anus. 



The mouth, which is provided with teeth, leads into an oeso- 

 phagus, which ends in a proventriculus, and has a dorsal diverticu- 

 lum. The ventriculus is short. Malpighian tubules mark the 

 commencement of the intestine. The hind gut is coiled. The 

 salivary glands are well marked. 



The larva becomes a dark brown or black pupa, 9 to 10-5 by 

 4 to 5 millimetres, with an anterior conical and a posterior rounded 

 end, and marked by annular ridges. The pupal stage lasts two to 

 three weeks. 



Habits. — The fly does not bite man. The larva, as described 

 above, attacks man and fills its dorsal oesophageal pouch with blood, 

 and thus acquires a red colour. 



Pathogenicity. — As far as is known it is non-pathogenic. 



In 1911 Roubaud described a new genus, Chayomyia Roubaud, 1911, of 

 whicli the larvae of two species, C. houeti Roubaud, 191 1, and C. chcsrophaga 

 Roubaud, 1911, were blood-suckers attacking African wart-hogs and African 

 ant-eaters. 



