NEW SPECIES OF TWO-WINGED FLIES OF THE FAMILY 

 CYRTIDAE, WITH A NEW GENUS FEOM THE PHIL- 

 IPPINES 



By J. M. Aldrich 

 Associate Curator, Dwision of Insects, United States National Museum 



The present paper contains two new species of the genus Lasia 

 from Costa Rica, and a new genus and species from the Philippines. 



LASIA COLEI, new species 



Male. — ^Length, 12.5 mm. 



Bright metallic green; posterior part of abdomen more coppery. 

 Legs black, tarsi pale yellow. 



Head flattened in front; eyes densely covered with light yellow 

 pile; back of head and ocellar triangle shining green, the latter not 

 elevated but with two large and distinct ocelli. Eyes contiguous to 

 the middle of the head in front, where the antennae are situated; 

 these are small and slender, second joint except base and small por- 

 tion of the base of the third joint yellow, remainder of third joint 

 black, its tip sharply pointed. Proboscis when folded back slightly 

 longer than the abdomen; no visible palpi. Pile of thorax yellow, 

 rather dense, with some black hairs on the posterior part and on the 

 scutellum. Abdomen in side view with erect black pile on the 

 posterior part of segments one to four. This pile scarcely shows at 

 all in the direct view. On the anterior portion of these segments 

 there is some yellow pile which is continuous along the sides. Venter 

 blue and violet with distinct pale hind margins of the segments; 

 coxae shining green. Calypters with dense yellow pile, subhyaline 

 in the middle with blackish rim. 



Wing light brownish, the first and second veins coalescent before 

 their tip; the petiole is joined at right angles just at the costa, by 

 the upper branch of the fork of the third vein ; the second and third 

 branches of the fourth vein reach the margin. Halteres with brown 

 knob crossed by a yellow streak. 



No. 2705.— Proceedings U. S. National Museum, Vol. 72, Art. 9. 

 5823&— 27 1 1 



