140 Nicholls and Kichardson — Tiro New Species of Acrotelsa. 
15. Tlie maxilla. 
16. The labium. 
17. The mandible. 
18b. The median metathoracic plate. 
18a- Tlie median mesotlioraeie plate. 
19. Typical antennal segments. 
20. Typical scales. 
Printed for the Uoyul Society of Western Australia by It. S. 
Sampson, 971-973 Hay Street, Perth. 
