38 



tlie second, seven in tlie external one — the largest of which, 

 cover an area scarcely less than that of the insect's eye, but 

 they are not strongly elevated in proportion to the area they 

 cover. The first of these rows terminates apically at the end 

 of the keel that limits on the upper side the upper lateral 

 groove of the elytra ; and the space between the external row 

 and the above-mentioned keel, as well as the interstices 

 between the rows, is pretty thickly strewn with small round 

 granules. The lower lateral keel dividing the lateral groove 

 into two very unequal parts (the upper being the narrower) 

 commences a little behind the shoulder, not, however, taking 

 its rise from the upper keel, and both keels terminate consider- 

 ably short of the apex of the elytra. The apical external tooth of 

 the front tibiae is nearly as long as the basal three joints to- 

 gether of the tarsus, the four teeth above it being in rotation, 

 each about half the length of that in front of it, so that the 

 topmost tooth (which is above the middle of the tibia) is quite 

 short, though perfectly well defined. Above it there are rudi- 

 mentary indications of one or two more teeth. The presence 

 of more than three teeth on the anterior tibiae sufficiently dis- 

 tinguishes this species from all others of the genus hitherto 

 described. 



There is a single specimen in the South Australian Museum, 

 but I cannot ascertain where it was found. 



BEMBIDIID^. 



TACHTS. 



T.iiifuscatits, s]). HOY. Elongatus ; depressus ; piceus ; nitidus; 

 prothorace dilutiore ; antennis, palpis, mandibulis, pe- 

 dibus, elytrisque testaceis, his circa scutellum et circa 

 suturae partem pone medium inf uscatis ; antennis sat elon- 

 gatis ; prothorace transverso postice augustato, vix evi- 

 denter canaliculato, angulis posticis distinctis obtusis ; 

 elytris sat parallelis, striis 4 punctatis antice leviter 

 notatis, suturali solum ad apicem attingente, hac fortiter 

 arcuatim recurva. Long., 2-J mm. 



Compared with the European T. histriatits, Duftschm., apart 

 from colour differences, this insect is somewhat narrower, and 

 more parellel, and much less convex. There is very little dif- 

 ference inter se in the profundity of the four elytral stride, but 

 they are all fainter than the two strise near the suture in T. hi- 

 stinatus ; the recurved stria does not diif er much except in being 

 more arched ; the stria close to the margin is very much deeper 

 than in hisiriatus, especially close to the apex, where it widens 

 out and seems to be divided by a short keel. A similar struc- 

 ture exists, but much more obscurely, in histriatus. There are 



