COLEOPTEBA.—LEA. 221 



Family CHRYSOMELID.E. 

 CHALCOLAMPRA TENUIS Lea. 



Mr. Hacker has taken several specimens of this species in the National - 

 Park, near Brisbane, and these have the elytral markings not in the form of 

 four abbreviated fascia? connected with the suture only, but the three apical ones 

 are connected at their outer edge as well, so that there are two pale elliptical 

 spots on each side of the suture (one postmedian and one subapical) ; on one 

 specimen the two basal fascite are free externally, and on another the three 

 apical fasciaj are not quite connected externally, so that the spots are not entirely 

 enclosed. 



DITROPIDUS DAVISI Saund. 



This species is abundant in South Australia and is very variable in size 

 and markings; the length ranges 2-25-3-75 mm.; the width, apart from sex, 

 also varies, the smaller specimens being decidedly narrower than the larger ones. 

 The male is narrower and less robust than the female, its abdomen is smaller, 

 iionfoveate, incurved to the middle, and with the tips of the pygidium slightly 

 produced forwards; the seriate punctures on the elytra are really rather small, 

 but owing to ''waterlogging" appear to be decidedly large; their true sizes may 

 be seen from an oblique direction. All the forms have the intercoxal process 

 of the prosternum semicircularly emarginate posteriorly, with the hind angles 

 sharply produced ; the legs and i^arts of the under surface are also variable, but, 

 disregarding these, some of the forms before me are as follows : — 



Typical. — On this form (a rather rare one) the prothorax is immaculate, 

 the head is dark at the base, and the elytra have the base, apex, and suture dark, 

 so that each elytron has a large pale spot, but each spot is sometimes, greatly 

 reduced in size and sharpness. Uab. — New South Wales and South Australia. 



Var. A. — Like the typical form, except that the head is entirely pale; on 

 one specimen the elytral spots are greatly reduced in size and brightness. Hah. — 

 South Australia (Ooldea and Port Lincoln). 



Var. B. — Like the typical form, except that it is not quite so wide, and 

 tiiat the prothorax has a transverse black or blackish fascia extending almost to 

 its sides ; the fascia varies from about one-third the length of the segment to 

 covering its entire surface except for narrow edgings, occasionally it actually 

 touches parts of the sides ; the elytral spots on such specimens are usually greatly 

 reduced in size, and the black part of the head is greatly extended; on one 

 specimen of it the prothoracic fascia appears as three semi-detached spots; on 

 another the fascia appears as a slight and rather narrow infuscation. Hah. — 

 South Australia. 



Var. C. — Like the preceding variety, except that the prothoracic fascia 

 is broken up into two spots. Eah. — South Australia (Adelaide and Lucindale). 



Var. D. — Prothorax entirely dark, head dark except for parts of muzzle ; 



