collected in Australia and Tasmania. B95 
DercraLMa, 
Decialma, Pascoe, Ann. and Mag. Nat. Hist. (4), iii., 
p. 291 (1869). 
Decialma erichsoni, n, sp. (Plate VIIL., fig. 11.) 
Decialma erichsoni, F. Bates, in litt. 
d. Moderately elongate, black, the upper surface with a cwruleous 
lustre, shining, glabrous. Head coarsely, rugosely punctured, the 
vertex with a small transverse impunctate space in the middle ; 
antenns pitchy-brown, slender, extending to a little beyond the 
base of the prothorax, joint 3 nearly as long as 4 and 5 united, 9 
and 10 a little longer than broad, obconic, 11 one-half longer than 
10, bluntly rounded at the tip; prothorax short, very strongly 
transverse, convex on the disc, broadly and deeply depressed 
towards the sides, with a large broad space between the middle and 
the base more deeply excavate, the lateral margins explanate and 
strongly upturned, the sides feebly rounded, slightly convergent at 
the base and more distinctly so in front, the apex very broadly 
truncate in the middle, the anterior angles rounded, strongly, very 
broadly produced, the base deeply bisinuate, the hind angles sub- 
rectangular, the surface thickly, moderately finely punctate, a 
median line on the dise and the lateral portion anteriorly almost 
smooth ; scutellum smooth ; elytra considerably broader than, and 
about four timesas long as, the prothorax, subparallel in their basal 
half, moderately convex, thickly, irregularly, and rather coarsely 
punctate (the punctures becoming much finer at the apex), and 
with indications of irregular faint raised lines; beneath very 
shining, the metasternum at the sides and the adjacent part of the 
epipleura with coarse scattered punctures, the flanks of the pro- 
thorax feebly wrinkled, the sides of the ventval segments longi- 
tudinally wrinkled and with a few scattered punctures, the median 
part closely and more finely punctured ; prosternum horizontal, 
very strongly, convexly produced behind, and received by the 
exceedingly deeply excavate mesosternum, the latter U-shaped, 
horizontal, with the strongly raised sides vertical in front ; legs 
pitchy-black, the tarsi paler ; anterior tarsi slender ; hind tibiz on 
the inner side subangularly widened at about one-fourth from the 
base and slightly sinuous. Length 10}, breadth 4% mm. 
Hab. 'asmania—Denison Gorge, near Launceston, 
Specimens of this insect are also contained in Mr. F. 
Bates’s collection, labelled with the name I have adopted, 
