o44 
CHARLES T. ERUES 
Aphiochæta Brues. 
On account of the considerable number of species falling into this 
genus I have thought it best to include a table for their determination. 
1. Scutellum with four marginal bristles. „„ „„ „„ _ „„ „„ „„ 2. 
Scutellum with two marginal bristles. _ „„ 5. 
2. Abdomen with first three segments black, remainder pale yellow. 
A. apicalis n. sp. 
Abdomen dark, without conspicuous markings. ï „„ „„ „„ „„ :1; 3. 
3. Only two proclinate frontal bristles. „„ „„ „„ „„ A. tibialis n. sp. 
Four proclinate bristles as usual. „„ „„ „„ W . . „„ „„ „„ 4. 
4. Costal cilia very short and thickly placed. „„ _ „„ A. limbata n. sp. 
Costal cilia long and sparse. „„ „„ „„ „„ _ „„ _ A. rustica n. sp. 
5. Frontal groove and ocellar tubercle present. m „ .. 6. 
Frontal groove and ocellar tubercle wanting. „„ A. planifrons n. sp. 
6. Palpi black, enlarged in the male ; anterior metatarsus enlarged in male. 
A. crassimana n. sp. 
Palpi yellow. „„ _ „„ l. „„ _ „„ „ „„ 7. 
7. Halteres pale. _ „„ „„ „„ „„ A. debilis n. sp. 
Halteres blackish. „„ „„ „„ „„ „„ „„ „„ „„ „„ „„ „„ „„ 8. 
8. Legs yellowish testaceous. _ „„ „„ „„ „„ „„ A. minutissima n. sp. 
Legs piceous. „„ „„ _ „„ „„ „„ „„ A. sodalis n. sp. 
Aphiochæta apicalis n. sp. 
Female. Length 1*5 mm. Stout, black, last three abdominal seg¬ 
ments pale yellow. Head large, black; front quadrate, hairy ; each anterior 
corner with two reclinate bristles, central portion anteriorly with 4 large 
proclinate ones arranged at the corners of an inverted trapezoid ; above 
these is a downwardly curved row of four, followed by the usual ocellar 
row. Post-ocular cilia very strong, cheeks each with a pair of downwardly 
directed macrochætæ. Antennæ black, the arista distinctly pubescent. 
Ocellar tubercle and frontal groove present. Palpi large, yellow, with strong 
bristles. Dorsum of thorax dark brown, slightly shining, without dorso- 
central macrochætæ, although there is a more lateral pair which is usually 
present in addition to the dorsocentrals. Scutellum wider than long, with 
four marginal bristles. Abdomen stout and tapering, first three segments 
black, remainder pale, bright yellow ; surface shining, almost devoid of 
hairs ; venter yellow, black anteriorly along the sides. Legs brown, diluted 
with a tinge of yellow; posterior femora stout, their tibiæ faintly but 
distinctly setulose ; four anterior tibiæ indistinctly setulose. Wings long 
and narrow, tinged with yellow, the costal vein reaching distinctly beyond 
