DIPTERA. 263 
pressed, obliquely rounded at the tip, nearly twice the length of the second 
joint: abdomen full twice the length of the chest; first segment cylindvical, 
with a large testaceous spot on each side of the hind border ; second and ~ 
following segments together spindle-shaped, broader than the first, and 
about twice its length; second testaceous along the fore border; tip 
curved beneath: legs red ; fore-thighs black towards the base ; feet black : 
wings almost colourless, dark brown along the fore border for full one-third 
of the breadth ; first posterior areolet closed on the border of the wing; 
prebrachial vein almost straight beyond its flexure; veins black: alule 
whitish with pale yellow borders: halteres yellow. Length of the body 
5 lines; of the wings 8 lines. 
Van Diemen’s Land. 
Genus TACHINA, Fabr. 
In this and in some of the following groups, the genera of Desvoidy 
and of Macquart are not adopted, as the characters assigned to them fre- 
quently differ from those of the species here described. 
The following Tachine may be grouped thus :— 
a. Fifth feeler-joint long. 
b. Second feeler-joint long. 
ce. Third feeler-joint twice the length of the second. 
similis. 
ec. Third feeler-joint longer than the second, 
d. Third feeler-joint convex above. sescssseeeesseseeseereesee Jurinia. 
pilosa, triformis, notata. 
dd. Third feeler-joint straight above ....ccsecusereeeeereeee Hystricia. 
varia, caliginosa, lativitta, similis. 
ec. Third feeler-joint shorter than the second. 
@) Palpw clavate ivesssisssiarsseceans SCOP DEES Waiecececieue, Hap IMCIBE 
Californie, divisa. 
Ud Pap y AO) cccsivassasspuuasasesstaptstepsssincrarsssacses, LYCOIDOMIY Its 
e. Third joint almost straight above. 
bomboides, nitida, sobria, subcinerea, vittata. 
ee. Third joint yery convex above. 
atra, transversa, obtusa, dorsalis, apicalis, fulva, 
