BY FREDERICK A. A. SKUSE. 
1377 
186. Plecta dimidiata, Macquart. (PI. xxxix., fig. 6, ^). 
P. dmiidiata (^), Macq., Dipteres Exotiqiies, Suppl. 1846^ 
p. 20, No. 6, pi. 2, fig. 8. 
(J. — Length of anteniiEe 0-020 inch ... 0-50 millimetres. 
Expanse of wings 0-180 x 0-060 ... 4-56 x L54 
Size of body 0-210 x0-035 ... 5-33 x0-86 
5. — Length of antennfe 0-020 inch ... 0-50 millimetres. 
Expanse of wings 0-250 x0-090 . . 6-35 x 2-27 
Size of body 0-230 x 0-045 ... 5-84 x M3 
and 5. — Antennae much shorter than the head, moderately 
robust, stouter in the 9 than in the dull black, densely 
covered with a minute pubescence, 2- + 6-jointed, all the 
joints with very short verticils. Head, eyes, ocelli and 
palpi black, the eyes not beset -with hairs. Thorax ferru- 
ginous-ochraceous, nitidous, the anterior portion,* from imme- 
diately below the humeri in the only very slightly on the 
anterior border in the 9^ dull black ; no visible pubescence when 
viewed with an ordinary lens ; pleurae black, in the 9 with a 
scarcely perceptible reddish tinge ; scutellum ferruginous-ochra- 
ceous, more or less tinged with black in the ^ ; pectus black ; 
mesothoi-ax black, the metanotum in the 9 ferruginous-ochraceous. 
Hal teres black, the stem long and slender. Abdomen black, some- 
what shining, densely covered with black hairs ; in the ^ rather 
more slender than the thorax and twice its length, rather longer 
and more robust in the 9 ; ^ forceps small, not the width of the 
terminal segment ; 9 ovipositor short. Legs black, nitidous, with 
a dense black pubescence ; tibial spurs short, black ; pulvilli 
pallid. Wings smoky-brown, with a somewhat greyish tint. 
• Macquart in his desciiption says, “moitie ant^rieure clu thorax d’un 
noil- mat.” 
