BY THOMA.S G. SLOANE. 207 



Tachvs quebnslandicus Sloane (1903). 



I found this species common on the sandy margin of a tidal lagoon at 

 Townsville in May. 



T. criiciger Putzej'S (1875). I have a specimen ticketed Celebes which I 

 cannot differentiate from T. queenalmidicus, though the colour is darker, and more 

 iridescent, and the spots of the elytra are more clearly detined and do not ap- 

 proach each other so closely on the sides; I belie%'e this is likely to be T. 

 cntciger Putz., but am not absolutely sure on the point. 



Tachys infuscatus Bla«kburn (1887 



Hab. — Western Australia: Swan River (Lea); South Australia (Black- 

 burn); Victoria (Fischer). Mr. Ejnar Fischer has informed me that T. infus- 

 catus is common near salt water about Melbourne. Blackburn has drawn at- 

 tention to the great resemblance of T. similis Blackb., to T. scutellaris of the 

 Palaearetic Region (Trans. Roy. Sec. S. Aust., xxv., 1901. p. 122), but T. in- 

 futicatus resembles T. scutellaris even more closely than T. similis does. 



Tachys similis Blackburn (1887). 



Hab. — South and Central Australia. Specimens were sent to me by Mr. A. 

 M. Lea from Adelaide. Flinders Range, Oodnadatta, and CunnamuUa. 



Blackburn ditferentiated 7'. similis from T. infiiscattis by colour; shorter, 

 broader and more depressed form; posterior angles of prothorax ''though obtuse 

 not far from right angles." With these views I agree, but would note that in T. 

 similis the prothorax is more transverse and its base is less strongly oblique on 

 each side behind the basal angles, the summit of the angles does not appear to 

 me to differ perceptibly, but the greater slope of the sides of the base makes 

 the angles in T. infuscatus seem more obtuse. 



Tachys sinuaticollis Sloane (1903). 



Hab. — Queensland: Cairns; Celebes; Java. 



Mr. Lea sent me a good series of specimens ticketed "Cairns, taken at light"; 

 and numerous specimens from Celebes and Java were among the duplicates of the 

 Van de Poll collection. 



Tachys triangularis Nietner (1858). 



Hab. — Africa; Oriental Region; Australia. 



As long ago as 1873 Bates had recorded that T. atriceps Madeay (1871) 

 ■was a synonym of T. triangularis Niet. 



Tachys mastersi, nom. nov. 



Rembidium sexstriatum, Macleay, Trans. Ent. Soe. N.S. Wales, ii., 1871. p. 

 117 (nom. praeocc). 



The name of T. mastersi is now proposed to replace T. sexstriatus Macleay, 

 which had been used for a species of Tachys as long ago as 1812. 



Hab. — Queensland: Gayndah (Masters), Cairns and Cooktown District 

 (Sloane). I found specimens on the sandy margins of a pool in a rivulet at 

 Helenvalc, near Cooktown. 



