265 



Form 2 is also a trifle wider than Form 1, the antennary 

 tubercles are more pronounced and shining, and the pro- 

 thoracic punctures are rather more noticeable, owing to the 

 less density of the clothing. On both forms the legs vary 

 somewhat in colour ; sometimes all the femora are as pale 

 as the tibiae and tarsi, sometimes the front pair of femora, 

 or the two front pair are deeply infu seated ; on not one of the 

 eight are the hind femora dark. The antennae also could 

 not fairly be called black, although the amount of infuscation 

 varies. 



Of Form 2 there is a female before me ; it closely resembles 

 the male, except that the abdomen is larger and more convex, 

 that the legs are somewhat shorter, and that the antennae are 

 non-flabellate, joint three is about once and one-half the 

 length of four, the fifth is triangularly produced on one side, 

 and the produced part gradually elongates, till on the tenth 

 it is much longer than the supporting base, the eleventh is 

 slightly longer than the tenth with its produced part. 



A female from the Dandenong Ranges agrees closely in 

 structure with the female of Form 2, but has the elytra and 

 abdomen much darker ; at first glance almost as dark as the 

 prothorax. 



Form 3. There is in the Queensland Museum another 

 form, from Brisbane, that differs in being still wider than 

 Form 2, the antennal rami longer, quite black, and the five 

 basal joints almost black, the median line on the head is 

 intermediate between Forms 1 and 2, and the prothorax has 

 a narrow median line, traceable (except for a slight inter- 

 ruption) from apex to base, and becoming rather deep near 

 base. 



Form 1 agrees closest with the original description ; the 

 other forms are perhaps deserving of subspecific names, but 

 at present it appears preferable to simply number them. Two 

 of the specimens of Form 1 are labelled as from New South 

 Wales, and one of Form 2 as from King George Sound. The 

 type was from New Ploiland. 



The males of the genus may be thus distinguished : — 



Long antennal rami commence on the fifth joint ... occidentalis 

 Long rami commence on the sixth joint. 



Separation of eyes more than length of first joint 



of antennae sericea 



Separation about equal to length of second joint fusca 



Eyes almost touching megalops 



EUCTENIA MEGALOPS, n. Sp. 



o* . Piceous-brown, some parts almost or quite black ; 

 antennae, palpi, and claws castaneous, mandibles partly red. 



