BY THOMAS G. SLOANE. 557 



in one other species, viz., M. frenchi SI. Its place in the genus 

 is beside M. howitti Cast., (with which I am unable to compare 

 it) but the following are some decided differences : — M. howitti, 

 elytra 9 - 5 x 6'8 mm. (from a specimen (£) in Mr. French's pos- 

 session), prothorax with lateral carina nonexistent, apical ventral 

 segment scarcely sinuate at apex in male* From M. greyana SI., 

 to which it has some affinity, it differs conspicuously by colour, 

 prothorax with disc far more sharply raised above basal area, 

 lateral margin entire; elytra with shoulders not at all ampliate, 

 not rugose near base; apical notch of abdomen in male much 

 deeper, etc. The specimen before me has the elytra a little 

 parted near the apex, and evidently not soldered together, but I 

 cannot detect any underwings, and the great reduction of the 

 shoulders of the elytra indicates that they are not likely to exist. 

 This is the only Australian species in which I have found a seta 

 present on the four anterior trochanters. 



DlSTYPSIDERA HACKEBI, n.Sp. 



Elongate, convex; each elytron with a juxta-sutural basal spot,, 

 a humeral vitta, two decidedly separated median spots, and an 

 apical spot white. 



Upper surface blue-black, becoming more metallic towards 

 sides; each elytron with two basal white marks separated by the 

 deep humeral depression (inner mark small and round, outer at 

 humeral angle and giving off an oblique vitta extending back- 

 wards about one-third the length of the elytra), a rather narrow 

 elongate triangular juxta-marginal white mark just before the 

 middle of the length, a subcircular white mark near the suture 

 just before the posterior third of the length, and an apical wide 

 oblique white mark extending from beginning of apical curve 

 nearly to suture, the apical border black. Under surface chaly- 

 beate. Labrum black on each side with a wide central vitta 

 white. Antenna? dark with a subtestaceous mark on upper side 

 of basal joint. Colour of legs variable; male coxse, trochanters 



* These Proceedings, 1900, p.643. 



