4 
Psyche 
[March 
the genera in question. In the case of genera represented 
in Australia by single species, the species are character- 
ized and named in the key. A comparable key to New 
Guinean Agonini is given in my paper cited above, pages 
114-116. 
Preliminary key to Australian genera of Agonini 
1. Tarsi sparsely pubescent above; tarsal claws serrate 
on inner edge in basal half; (relatively large, c. 13-15 
mm., dull black; introduced) .... Laemostenus com- 
planatus Dej. 
— Tarsi not pubescent above; claws not serrate .... 2 
2. Tarsal claws each with an acute tooth on inner edge 
at base; (winged, brown, rather slender, prothorax 
suboval) Dicranoncus queenslandicus (SI.) 
— Tarsal claws not toothed 3 
3. Wings full and all normal setae of head and pronotum 
present 4 
— Wings vestigial and/or one or more pairs of supraocu- 
lar or lateral prothoraeic setae absent 7 
4. Sole of hind tarsus with a single, regular row of 
bristles on each side, with middle of sole bare; (slightly 
aeneous, Agonum-\\ke) Lorostemma cooki (SI.) 
— Bristles of hind-tarsal sole not as above 5 
5. Brown, bronzed, or black; last hind-tarsal segment 
without accessory setae at sides below; elytra (in 
Australian species) not spined Notagonum 
— Purple (or blue), at least on elytra 6 
6. Last hind-tarsal segment with accessory setae; elytra 
not spined; (prothorax narrow; elytra wide, purple) 
Colpodes porphyriacus (SI.) 
— Last hind-tarsal segment without accessory setae ; 
elytra spined at apex about opposite second intervals; 
(prothorax rather wide; color purple or bluish-purple) 
Violagonum (n. gen.) violaceum (Chd.) 
7. Wings full; humeri normal; (depressed; dull brown 
or black, often margined or finely speckled with pale) 
Homothes 
— Wings vestigial; humeri dentate; (convex; shining 
black) Odontagonum (n. gen.) nigrum n. sp. 
