290 IvECORDS OK THE S.A. Ml'SEUM 



Oil each side of middle of apex; the spots on the elytra consist of a semicircular 

 to transversely-oblong one about the scutellum, a small one on the suture near 

 apex, and a larger, rounded, completely isolated one, on the middle of each 

 elytron ; on two of the specimens the black portion of the i)roiiotum is entire, but 

 on tAvo others the middle of its apical half is red. 



THALLIS HOPLOSTETHA sp. nov. 



Plate iv, fig. 7. 



$ Black, two eh'tral vittae, abdomen, legs, antennae and palpi more or less 

 flavous, rest of under-surface more or less obscurely diluted with red. Rather 

 densely clothed with pale, rusty pubescence. 



Head strongly convex and with a stridulating file on forehead ; Avith fairly 

 dense but irr(^gular punctures elsewhere. Antennae with thii'd joint slightly 

 larger than tlie adjacent ones ; club rather small. Prothorax scarcely one-fourth 

 Avider than median length, apex Avidely produced and OA^erhanging head, notched 

 near each side, sides gently and evenly rounded, a narroAAdy impressed line almost 

 on each margin; Avith dense punctures, but leaving a shining median line on basal 

 half; produced portion of apex densely granulate. Elytra scarcely Avider than 

 l)rothorax, parallel-sided to near apex ; punctate-striate, striae distinct through- 

 out, interstices Avith rather coarse punctures, becoming smaller and denser 

 posteriorly. Prosternum Avith a large hairy cavity in middle of apex, an acute 

 process OA^erhanging the caAdty ; iiitercoxal process not very Avide, its hind end 

 obtuse. Abdomen A\'ith coxal lines distinct to near apex of basal segment. Femora 

 stout, grooved along under-surface, the ridge on each side of the grooA^e finely 

 serrated; tibiae Avidely dilated to apex. Length, 8-9 mm. 



9 Differs in having the head smaller, forehead not separately coua'cx, Avith- 

 out a stridulating file, prothorax shorter, the apex less overhanging the head, 

 Avitli asperate punctures instead of granules, the prosternum unarmed, and Avith- 

 out a medial-apical cavity. 



Hah. New South Wales: (lalston (D. Dumbrell), Sydney (A. M. Lea). 

 Type, I. 12010. 



The conspicuously armed prosternum, stridulating file on head, and longi- 

 tudinal markings of elytra readily distinguish this species from all other named 

 Australian Erotylidae. In the female the prosternum is unarmed, and its hind 

 parts are exactly as in T. insueta. The file consists of about fifteen transA^erse 

 ridges, becoming smaller in front ; they are often almost or quite concealed by the 

 OA'erlapping prothorax. On seA'eral specimens, especially females, the darker 

 parts are more or less chocolate-broAvn ; each elytral vitta commences on the 

 shoulder, is rather suddenly inflated iuAvards so as to occupy about six interstices, 



