﻿98 ERNEST E. AUSTEN — A NEW SPECIES OF STYGEROMY1A, &C. 



callus ; in addition to the foregoing markings, the edges of the dorsum imme- 

 diately behind the presutural depression on each side are suffused with a dark 

 brownish tinge, there is a dark brown mark in the middle of each postalar callus, 

 and the scutellum bears an ill-defined, mummy-brown, median, longitudinal stripe, 

 in continuation of the median stripe on the main portion of the dorsum ; pleurae 

 and pectus unicolorous grey. Abdomen : dorsum of first three segments shim- 

 mering grey, with an undertint of isabella colour ; dorsum of fourth segment 

 grey, not shimmering and without an isabella-coloured undertint ; dorsum of first 

 three segments with a clove-brown, median, longitudinal stripe, which is broader 

 on the second and third segments than on the first, and on the fourth segment is 

 continued as a narrower, sepia-coloured stripe ; extreme hind margin of first 

 segment and hind borders of two following segments clove-brown, second 

 and third segments also each with a large clove-brown blotch on each side 

 of middle line, resting on hind border and extending forwards as far as or a 

 little beyond middle of segment in each case ; first segment also with a pair of 

 similar but somewhat smaller and less sharply defined blotches ; fourth segment 

 with a large though fainter, sepia-coloured spot on each side of middle line, and 

 not in contact either with middle line or with anterior, posterior, or lateral 

 margin of segment ; all abdominal markings more sharply defined when the insect 

 is viewed at a low angle from behind ; membrane clothing ventral surface buff- 

 yellow, small median scutes grey. Wings : veins clove-brown ; bend of fourth 

 longitudinal vein somewhat less abrupt (the curve flatter and more gently 

 rounded) than in the case of either S. maculosa or S. sanguinaria, and the bent up 

 portion not perfectly straight but slightly curved upwards at the distal extremity. 

 Squamae (thoracic pair) yellowish waxen-white, their borders cream-buff. 

 Halteres : knobs cream-buff, stalks buff, darker at base. Legs : coxae and femora 

 dark grey, the latter more or less ochraceous-buff at base and extreme tips ; tibiae 

 buff, more or less suffused with grey, middle and hind pair with a greyish dark 

 brown blotch on proximal half ; tarsi clove-brown. 



East Africa Protectorate : plateau above Naivasha, alt. 7,500 ft., 

 1. i. 1911 (R. B. Woosnam). 



The donor, in whose honour the author has much pleasure in naming this fine 

 addition to the genus Stygeromyia, states that the specimen from which the above 

 description has been drawn up was caught in bush at sunset, in the act of biting 

 his arm. 



