TACHINIDAE OF ORIENTAL REGION 83 



long setae. Posteroventral declivity of the thorax widely membranous medially. Legs 

 unicolorous blackish brown. Wings more or less hyaline on the basal half and suffused with 

 dark brown on the apical half, brown colouring most intense preapically and fading slightly 

 towards the wing tip. Length approximately 9 mm. 



Holotype 9. Indonesia: Java, Pangrango, 7-10 000 ft [2-3000 m], i.1936 (/.. E. 

 Cheesman). In British Museum (Natural History), London. 



This species differs from other species of Lophosiosoma most conspicuously by 

 the incomplete sclerotization of the posteroventral declivity of the thorax (which 

 is broadly membranous in the middle). It differs also by possessing a sternopleural 

 seta (in which respect it resembles Germariochaeta) , in having a small second pair 

 of scutellar setae and in having no trace of ocellar setae or hairs, but with only 

 the holotype known it is not certain that these features will prove constant. 



Lophosiosoma obliteratum sp. n. 



Ocellar setae present but small. Humeral callus only with the single strong seta on the 

 ateral margin. Two notopleural setae. Prostigmatic seta absent or represented by a mere 

 hair. Sternopleural seta absent. Scutellum without paired tubercles, with one pair of setae. 

 Hypopleuron with one seta accompanied by one or more smaller setulae or hairs. Postero- 

 ventral declivity of the thorax with paired sclerotized lateral wings that meet at a distinct 

 mid-line suture. Legs unicolorous blackish brown. Wings mostly hyaline but lightly suffused 

 with brown colour antero-preapically. Length approximately 7 mm. 



Holotype q, India: West Bengal, Calcutta. In British Museum (Natural History), 

 London, ex coll. Brunetti. (The holotype lacks the antennae, the left hind leg 

 from the trochanter, and some tarsi.) 



This species combines features in such a way that it appears without doubt 

 to be distinct from rufofemoratum, its nearest relative. Its appearance is very like 

 that of L. bicornis but it differs from this species by the several conspicuous charac- 

 ters cited in couplet 1 of the foregoing key. The posteroventral declivity of the 

 thorax is rather like that of L. rufofemoratum but has a much more conspicuous 

 median suture at the junction of the lateral sclerotized areas. It differs most 

 obviously from rufofemoratum by the all-dark legs, and from javanam by lacking 

 a sternopleural seta. 



Lophosiosoma rufofemoratum sp. n. 



Ocellar setae present. Humeral callus with a very small inner setula (only just differentiated) 

 in addition to the strong outer seta. Two notopleural setae. Prostigmatic area with a few 

 exceedingly fine hairs but no differentiated seta. Sternopleural seta absent. Scutellum 

 without paired tubercles, with one pair of setae. Hypopleuron with a row of three subequal 

 setae and some fine hairs. Posteroventral declivity of the thorax sclerotized across its width 

 but with trace of a median line of union. Legs with the femora bright orange and the remainder 

 black-brown. Wings extensively suffused with brown colouring, but greyish hyaline along the 

 hind edge. Length approximately 10 mm. 



Holotype $, India: Himachal Pradesh, Simla, 7000 ft [2000 m], 31. v. 1939. In 

 British Museum (Natural History), London. 



