454 STUDIES IX AUSTRALIAN ENTOMOLOGY, 



mm.), lightly convex; a few pmictures and seta^ on disc; 

 sides lightly rounded on anterior three-fourths, straight poste- 

 riorly and meeting the base at right angles ; anterior margin 

 truncate ; base subtruncate, the middle a little produced back- 

 wards ; basal angles rectangular, obtuse ; lateral border reflexed ; 

 median line strongly impressed. Elytra greatly wider than 

 prothorax (8 x 5-3 mm.), lightly convex, a little narrowed to 

 base ; shoulders rounded, apex truncate ; eight narrow costje on 

 each elytron ; space between eighth costa^ and lateral border wide ; 

 lateral Ijorder reflexed. Underparts of protliorax and body 

 setose. 



Length 11-5-13, breadth 4-7-5-3 mm. 



Hah. — Northern parts of Australia. (King's Sound, W. W. 

 Froggatt ; Gulf of Carpentaria, (jn the authority of Mr. 

 French). 



This species was originally l)rought from Derby by Mr. W. 

 W. Froggatt, but the late Sir William Macleay in going through 

 the CarahiflcH from King's Sound did not consider it presented 

 sufficient differences from Ph. vfirticalis* Dej., to justify its being 

 recognised as a distinct species ; it may also be the variety of Ph. 

 verticalis, from Cooper's Creek, mentioned by Count de Castelnau 

 with " a yellow humeral spot "; t tome it seems a thoroughly 

 distinct species. Apart from its colour and smaller size, the 

 narrower prothorax, less strongly rounded on the anterior half 

 of the sides, is the decidedly different character that I notice 

 between the two species ; a comparison of all the specimens of 

 both species in my possession seems to indicate this as a constant 

 difference, and one that is readily seen when the two species ai-e 

 compared. The amount of black on the prothorax varies in 

 different specimens, and the yellow spots on the elytra at each 

 slioulder also var}' a little in size ; the shape of the fascia across 

 the middle of the el}i;ra is constant in the three specimens befoi'e 

 me ; it is produced both forwards anrl backwards at the fifth 

 costa. 



' See P.L.S.N.S.W., 1888 (2) III. )>. 4.-)l. 

 t Trans. Roy. Soc. Victoria, 186S. Vill., p. 109. 



