Species of Australian Saw-flies. 39 
Perga divaricata. 
sericea. 
sellata. 
lalage. 
Cerealces cyathiformis. 
Among other saw-flies in the collection were two female 
specimens of Perga Lewisit, Westw., differing from the type 
in having black antenne. 
Perga divaricata. 
Antenne six-jointed. 
Long. corp., ¢ 15 millim., ? 19 millim. 
Male.—Reddish chestnut, redder beneath ; antenne, a spot 
within each, a spot below each eye, clypeus, labrum, pro- 
thorax (except a curved transverse stripe in front), the tip of 
the central lobe of the mesothorax, the legs, a stripe on the 
lower part of the mesopleura (curving to the base of the 
middle coxe), a spot above the hind cox, and a row of spots 
on the sides of the abdomen beneath yellowish white. Abdo- 
men with segments 2-6 silky black above. Wings yellowish 
hyaline; stigma large, reddish, grooved, with a blackish cloud 
beneath ; only three submarginal cells, and even these imper- 
fectly separated. Hind wings with a blackish cloud covering 
the middle cell and extending beyond it above and below. 
Head, thorax, and scutellum thickly punctured; a deep 
groove running backwards outside each ocellus and slightly 
curving wards to the occiput, the space between convex and 
rather raised behind; mesothorax with the frontal and 
lateral lobes well separated, the former with a deep groove in 
the middle, and the latter each with three ridges meeting 
behind, the space between the two outer ones smooth. Scu- 
tellum convex on each side at the base and with a wide 
central groove, diverging behind, the projecting lateral spines 
rather wide apart. 
Female similarly coloured, but more varied with yellowish 
white, the punctures larger and the grooves on the head, 
thorax, and scutellum somewhat less strongly marked. The 
following additional yellowish-white markings may be 
noted :—The hinder orbits, two spots on the grooves near 
the occiput, the upper borders of the prothorax (which is red 
in the female), a line below the wings, a narrow line bor- 
dering the sides of the mesothorax above, and the extremity 
and lateral points of the scutellum. Wings yellowish hyaline, 
unclouded, but with some of the nervures (which are entirely 
