BY THOMAS G. SLOANE. 635 



tion were taken at Cooper's Creek, and I am perfectly satisfied 

 from memory that the specimen in the Howitt Collection named 

 as T. howitti was nothing like T. frenchi. I had not a specimen 

 of the Tetracha taken by the Callabonna Expedition with me to 

 compare with it [i.e., T. howitti], but it struck me as being 

 certainly the same thing." In conclusion, I would draw attention 

 to the evident and important differences between T. frenchi 

 and the description of T. howitti which, in themselves, seem 

 to effectually dispose of any possibility of their being synony- 

 mous : — (a) The great difference in facies as shown by de 

 Castlenau's measurements of T. howitti, (7 x 3 lines), T. frenchi 

 (about 9x3 lines) ; the elytra in T. howitti " short of an 

 oval form," in T. frenchi long, parallel and cylindrical, (b) The 

 differences in colour—" the buccal parts, the base of antennae, 

 legs and last two segments of the abdomen of a light 

 yellowish-brown" in T. howitti; while in T frenchi the two 

 apical segments of the abdomen are black (as is the whole of 

 the abdomen excepting the lateral parts of the three basal 

 segments, which are metallic-green or purple), the legs being 

 entirely black, the antenna? piceous-brown. 



As I have not a specimen of T. howitti, and am unable to see 

 one, I asked the Rev. Thos. Blackburn to send me a note on it, 

 and the following is the substance of his communication, founded 

 on the Tetracha brought from Cooper's Creek by Mr. Zietz : — 

 " This insect agrees extremely well with Castelnau's description 

 of T. howitti {e.g., elytra short of an oval form, . . . basal 

 five joints of antennae light yellowish-brown . . . legs yellow- 

 ish-brown . . . last two segments of abdomen brown, 

 becoming yellow on the last). Your T. frenchi is utterly 

 different The species I have as T. howitti is about as unlike T. 

 frenchi as one Tetracha can be unlike another." He also has 

 added a comparison with T. murchisoni, Fleut., as follows : — " It 

 is a shorter and considerably more convex form — the convexity of 

 the elytra much greater from scutellum to apex (looked at from 

 the side) and also from one lateral margin to the other (looked 



