NEW. CEYLON DIPTERA. 383 
Abdomen yellow, laterally strongly compressed, with short 
yellow hairs. Segments slightly darker at base, a black 
median line on basal half of third to sixth segments. Hind 
margin of first segment dark. Belly pale. Genitalia consist 
of a pair of small lamelle, below which is a conical organ with 
darker ovipositor at tip. 
Legs yellow, except tarsi, which are blackish. 
Wings slightly shorter than abdomen, pale yellow. Halteres 
slightly darker. 
Long : 3 mm. 
Described trom a single female, taken flying round Lantana 
scrub in shade. Suduganga, Matale, Ceylon, May 4, 1919. 
Type in my own collection. 
EXECHIA CRISTATA Nl. Sp. 
Female—Head: Frons black, covered with somewhat 
widely separated silvery-yellow pubescence. A transverse row 
of short black bristles over root of antenne. Hyes minutely 
black pubescent. Antenne, scape yellow, flagellum black, 
with minute pale pubescence. 
Thorax yellow, with pale pubescence. Posterior half of 
dorsum with a dark brown circular patch, reaching nearly to 
wing roots, into which extends from in front a V-shaped. 
yellow patch, the apex of which is nearly in a line with the 
wing roots. At posterior corners of thorax are small yellow 
patches extending inwards for about one-third the dorsal 
breadth, medianly the brown colour reaches the root of the 
scutellum. Pleurze yellow, except ptero- and meta-pleure, 
which are grayish-brown. A row of small black bristles on 
anterior margin, five long dorso-centrals from anterior margin. 
to base of V-mark, each row erect, but inwardly inclined, 
forming a dorsal crest. The two rows are continued, inwardly 
converging, by smaller, posteriorly directed bristles, along the 
margins of the yellow V-mark. Many irregularly placed 
small black bristles on the remainder of the dorsal area. 
Humerus with four strong bristles, a strong one above root of 
wings and on posterior corners. Scutellum large, dark brown, 
with two long parallel apical dark bristles reaching to middle 
of second abdominal segment. Meta-pleure with two strong 
black bristles. Metanotum dark. 
