137 



the genus) decidedly small, being much narrower than the in- 

 terstices. The degree in which the alternate interstices are 

 raised above their fellows is somewhat variable. The pro- 

 thorax has a median line, but it is quite concealed normally. 

 The size varies from 4 J to 6 mm. 



The sexes are very ill-defined : in some males, however, 

 the front tibiae are more strongly curved on the apical third, 

 and the basal portion is supplied below with a narrow keel, 

 which sometimes is rather suddenly terminated, but both 

 curvature and keel are not of constant strength, and those of 

 som.e males are not to be distinguished from some females. In 

 the male also the basal segment of the abdomen has an 

 arcuate apical median space slightly depressed below the basal 

 portion (but not concave). 



Mandalotus crudus, Er. 

 In specimens in good condition the median prothoracic 

 impression is scarcely, or not at all, traceable. 



Mandalotus ventralis, Blackb. 

 Remarkably distinct by the abdomen of the male. I have 

 specimens from King Island and Tasmania, as well as from 

 South Australia (the original locality). The specimens before 

 me vary from dark brown, with pale markings, to almost 

 white, with more or less distinct brown spots. 



Mandalotus valgus, Pasc. 

 In describing carnpylocnemis and scaher, I compared 

 them with a species I supposed to be valgus; this species, 

 although it closely agrees with the figure of that species, and 

 in many respects with the description, I now find was wrongly 

 identified, and I have described it as intercoxalis. 



Mandalotus cellaris, Pasc. 

 Mr. Masters (from whom the types of this species were 

 received) has given me three Sydney females as belonging to 

 this species : they differ, however, from the description in being 

 smaller (only two lines including the rostrum in its normal 

 position), and have not the hind tibiae "intus fortiter bisintM- 

 tus" (probably, however, a masculine character). I have also 

 two specimens (sexes) from the Nepean River, belonging to 

 the same species, and of which the male has the hind tibiae 

 (as seen from the sides) regularly dilated to about the middle, 

 and thence strongly arcuate to the apex : seen directly from 

 above or below also, the apical third appears much narrower 

 than the basal two-thirds. From >:purn(s it differs in having 

 the front coxae more distant, and the median line less dis- 

 tinct, as well as in the hind tibiae. 



