Australian Gistelidae. 75 



Immature specimens of all the black species are red, but the distinc- 

 tion between striatus and splendens is very marked in the sculpture 

 of the undersurface, while the seriate punctures of striatus arc 

 smaller and less defined than in splendens and dubius. 



T. minor and T . ruber differ from the first four species in the 

 above table, in the forehead between the eyes being wider, and with- 

 out the raised subcarinate impression shown in those species. 



Tanychilus pulcher, n. sp. 



Ovate and convex; upper surface brilliant metallic purple, pro- 

 thorax darker, sometimes greenish, the suture and apex of elytra 

 brilliant green, antennae underside and legs black, abdomen with 

 purple reflections. Head and prothorax very similar to that of T . 

 striatus, Newm., but more decidedly, but not strongly punctate, 

 antennae long, joint 3 longer than 4, 4-10 successively shorter than 

 the preceding, two apical joints, narrower than the 9th, 11th as- 

 long as 10. Prothorax widest and truncate at base, arcuately nar- 

 rowing to apex, posterior angles rather widely acute, a small basal 

 depression, without medial line. 



Scutellum, scutiform, punctured. Elytra scarcely wider than 

 the prothorax at base, ovate and convex, striate punctate, the punc- 

 tures in striae small, close and regular, the intervals flat, or 

 nearly so, minutely punctate; meso and metasternum coarsely 

 punctate, abdomen finely striotate. Legs, especially the posterior, 

 long, tibiae and femora simple in both sexes. 



Dimensions — 14 x 5 mm. 



Habitat. — Mary River, Northern Territory (Dodd). 



Five specimens examined, two (slightly damaged) in the author's 

 coll., from Mr. Dodd, one old specimen labelled " New Holland " in 

 the British Mus. consignment, and two fresh specimens (type cf 

 and ?) in the South Aus. Mus. While very similar in structure 

 to the common southern species, striatus, Newm., and splendens. 

 Bless., it is readily differentiated by its brilliant colour, and flat 

 elytral intervals. Types in the South Aus Mus. 



Tanychilus minor, n. sp. 



Elongate, navicular, glabrous, prothorax black, head, elytra r 

 abdomen and basal points of antennae red, apical joints obfuscate, 

 tips of mandibles black, legs and palpi yellow, the knees sometimes- 

 piceous. Head, labrum strongly produced; closely punctate, eyes 

 very large and prominent, separated by a distance less than the 



