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 Lewisii^ Westw., differing from the type 

 in having black antennse. 



Perga divaricata. 



Antennae six-jointed. 



Long. Corp., (J 15 niillim., ? 19 raillim. 



]^[ale. — Keddish chestnut, redder beneath ; antennfe, 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 coxae) , a spot above the hind coxse, 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 inwards 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 



