420 REVISION OF THE GENUS SPHROTRANA, ETC., 



Stigmodera unimaculata, n.sp. 

 Oblong-oval, moderately widened at the posterior third. 

 Head and pronotum blue-green; antennae, legs, and underside 

 bright metallic-green ; elytra yellow, with a large triangular 

 macula near, or on apex, blue-black; apical region sanguineous at 

 sides, basal margin narrowly violaceous. 



Head densely punctate, not furrowed between eyes. Prothorax 

 4 mm. long; 6 mm. wide at base, 3 5 mm. wide at apex. Anterior 

 margins produced with angles acute, anterior margin wide and 

 raised. Sides sinuately widened, widest behind middle, with 

 depression near widest point (in one specimen foveate), then 

 slightly incurved, posterior angles subrectangular; base sinuate 

 and lobed, middle lobe moderately produced backward. Central 

 canal strongly marked throughout. Disc moderately convex, 

 deeply and closely punctate. Scutellum dark blue, cordate, 

 slightly elevated and smooth. Elytra 13 mm. x 7 mm., widest 

 behind middle; same width as prothorax at base, then sinuately 

 widening, and rather widely rounded at apex, without dentation; 

 suture divergent at apex. Disc striate-punctate, punctures in 

 striae not in general clearly marked, but evident on basal half, 

 becoming smaller and inconspicuous towards apex, where the 

 striae themselves become vague or obsolete. Intervals very 

 slightly raised. The black macula in one specimen extends to the 

 apex; in the other it does not reach apex; with exterior four to 

 five intervals stained red, this colour not extending beyond 

 posterior third. Beneath, closely and regularly punctate, the 

 punctures becoming gradually finer towards apex of abdomen. 

 Tibiae and tarsi clothed with short yellow hair. Dimensions — 

 18-19 x 7-8 mm. 



Hab. — Cairns district, N.Q. (Mr. Henry Hacker). 

 In general appearance like the preceding species, but on closer 

 view widely different and easily separated from it by its shorter 

 and proportionately wider form, its widely different sculpture, 

 and its undentate elytral apex. The colour and shape of the 

 apical maculae differ, that in S. unimaculata having anterior edge 

 straight (or bisinuate with concavities facing forward) ; in 

 S. caudata it is oval, with anterior edge convex towards the tront. 



