On an Abnormal Specimen ©/"Antedon rosacea. 195 



but as I have not seen Liochoria Hatloni, I cannot state 

 whether the sternal structure differs from that of the species 

 I now locate in the same genus. These five species evidently 

 form one natural group. 



Cytilissus, gen. nov. 



Facies resembling the setose species of Mort/chim. An- 

 tennce short, first joint large, cylindric, second quite half the 

 length of the first, narrowed apically, third elongate and 

 slender, fourth slender, shorter than third, fifth broader, sub- 

 quadrate; cluh elongate, oblong, about as long as joints 3 to 

 5 taken together, compact, very indistinctly articulated, but, 

 so far as I can see, composed of two nearly equal joints. 



The antennee, therefore, seem to have but seven joints, a 

 character which of itself is sufficient in this group for generic 

 separation. 



Cytilissus claviger, sp. n. 



Convex^ broadly oval or subrotundate ; with numerous 

 erect, elongate, slender, cinereous setse or hairs ; piceous, 

 slightly sliining, the tibiae and first joint of the antennas red, 

 tarsi and palpi yellow. 



Head finely and distantly punctured. Eyes distinctly 

 faceted. Thorax strongly transverse, narrowed anteriorly, 

 sides straight, base and apex truncate, its angles acute ; its 

 surface very finely but not closely punctured. Scutellum 

 invisible. Elytra distantly and very finely punctured. Legs 

 with fine setse ; anterior tibiae grooved along the outside, the 

 middle pair only a little curved externally. Tarsi moderate, 

 the third joint with a thin well-developed membranous appen- 

 dage. Palpi thick, obtuse at the extremity. 



Underside pitchy, punctate, with pale longish hairs. 



Length 1^, breadth f line. 



Mount Pirongia. 1 regret having been unable to find 

 more than one of this interesting species. 



[To be continued.] 



XXIX. — On an Abnormal Specimen of Antedon rosacea. By 

 Herbert C. Chadwick (from the Zoological Laboratory 

 of the Owens College) . 



[Plate Vm.] 



Three months ago, while selecting specimens of Antedon 

 rosacea for serial section-cutting from a number which had 



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