340 Mr. C. G. Lamb on Exotic ChloropidaB. 



importance in the present subfamily. One species is repre- 

 sented by a specimen in first-rate condition, the other by a 

 very good specimen and a headless one. At present it seems 

 best to adopt a makeshift and place them in the same genus, 

 although it is highly probable that further research will 

 discover other forms allied to both the species, which should 

 then be placed in separate genera. The generic description 

 has therefore been drawn so that if the words in brackets 

 are deleted the characters will hold for the first species 

 (variegata) and any future congeners ; the other species 

 (ornata) can then be relegated to a new genus. 



Generic diagnosis. — The whole insect, including frons, 

 glabrous ; forehead and mouth-margin about equally promi- 

 nent, with a concave profile between ; the tangent-plane to 

 these and that to the frons meet at a little more than a right 

 angle. Antenna?, 3rd joint suborbicular, rather like that of 

 Sipkonella, with a faintly pubescent arista. Eyes absolutely 

 bare, long-oval, oblique. Head-bristles fairly normal, small 

 inner verticals, large outer, parallel post-verticals on the 

 ridge, small ocella-rs many (or a few), fine f. o. hairs. The 

 triangle ill-differentiated except by colour (or scarcely at all) 

 from the frons. Single vibrissa. Tongue fleshy, not long, 

 with a distinctly bent tip. Thorax with the d.-c. lines 

 marked by a row of bristle-bearing punctures, rest of dorsum 

 with fairly regular bristle-rows of different " pitch " from 

 that of the d.-c. punctation (or perfectly smooth). The 

 scutellum is remarkable ; it is triangular in outline, long, 

 with long divergent end-bristles and a following row of four 

 or five smaller stout stubbly ones on the lower edge, all of 

 them standing on more or less well-marked papilla? as in 

 Meroscinis ; dorsum swollen in profile (or flattened on the 

 disc). Wings clear, with venation as shown in fig. 16. 

 Legs normal. 



The above will show that the general affinities of both 

 species tend towards some forms of Sipkonella, but the 

 exceptional scutellar development and other details render 

 the position of the genus very doubtful. 



Type, the following species with above reservation. 



Heteroscinis variegata, sp. n. 



Head (top view) : — Frons excessively shining orange, with 

 sparse and exceedingly fine hairs ; triangle leaf-shaped, 

 shining brown, the base about half the vertical cross-width, 

 the tip about § the distance from ocellus to frons. The face 

 is orange, antenna with 2nd joint orange, the suborbicular 



