240 Eustace W. Ferguson : 



known at present of local faunas to enable any Init very broad 

 lines to be indicated. The correlation of distribution Avitli physio- 

 graphic features and geological changes also requires investigation. 

 Much interesting is also the question of the invasion of Tasmania 

 l>y these insects, but that cannot be touched on heie. 



I have purposely dealt solely with the Aniycterides in this discus- 

 sion, but it is possible that other groups will be found to have 

 followed similar lines of distribution. 



In the case of wing insects the factors governing distribution 

 iiVQ so different that the result is likely to be quite different. The 

 Amycterides, however, are typically wingless ground forms, which 

 have travelled a long Avay in a very long time. Possibly a close 

 study of their distribution may enable some light to be thrown on 

 the geological history of our country. 



B. — ])excn ptioiis of new species, irifJi some notes on previously 

 described forms. 



PSALIDURA VESTITA, U. sp. 



$ Elongate, elliptical-ovate; size large. Black; rather densely 

 clothed with dingy yellow subsquamose pubescence; clothing more 

 or less uniform above, except on prothoracic granules and elytral 

 interstices; below clothing present on sternal segments, on the first 

 abdominal, at sides of the second, and at bases of the other ventral 

 segments; legs more or less clothed. Setae rather light brown. 



Head and rostrum as in P. Masfersi. Prothorax (6.5 x 7 mm.) 

 very similar to P. Masfersi, slightly more elongate; granules, if 

 anything, slightly smaller. Elytra (14 x S mm.) in shape similar 

 to P. Mastersi; the foveae regular, somewhat obscured by the cloth- 

 ing, the intervening ridges fairly regular, in the more lateral striae, 

 each ridge with a definite setigerous gianule in the middle; inter- 

 stices subcostiform, Avith obsolete granules, these becoming more 

 definite on the more laterally placed interstices. Beneath as in 

 P. Masfersi: the forceps thin, very similar, slightly more incurved 

 to apex. 



$ Larger and more robust; the protlioracic granules rather 

 ■coarser; elytral foveae less definite, the intervening ridges setigero- 

 granulate in all the striae. Beneath convex, without anal excava- 

 tion or forceps. 



Dimensions. — J" 23 x 8 mm. ; ? 25 x !).5 nun. 



Except for the clothing, there is nothing to distinguish the present 

 species from /'. Mastersi. The clothing is, however, quite distinc- 



