342 T. D. A. COCKERELL. 



3. Abdomen with first segment above (except excavated area) covered with white 



tomentum ; second and remaining segments red above and below 



(Murray I.) albobasal is Sm. £>. 



Abdomen without white on first segment 4. 



4. Upper surface of abdomen uniformly and densely covered with orange-red 



tomentum (Australia) mystacea (Fabr. ) Sin. 



Basal part of second and third segments with the hair darker and thinner, 

 producing the effect of two dark bauds (Australia) ■ . list n lata Sm. 



5. Face densely covered with long fulvous hair (W. Australia). 



erythropyga Sm. 



Face densely covered with white hair; the three basal joints of anterior tarsi 



white and greatly flattened and broadened, the second and third each 



with a black spot within; fourth and fifth joints slender, red (Swan 



R.) ferox Sm. %. 



Face with the surface not concealed by hair; scopa white; clypeus broad and 

 squarely produced; apex of labruni with outwardly-directed spines 



(Swan R.) heriadiformis Sm. 



(The actual type of heriudiformis is headless.) 



6. Four conspicuous white spots forming a curved line between the wings; abdo- 



men with narrow white hair-bands; hair of face partly black and 

 partly white ; claws with a sharp basal tooth ; scopa bright red, entirely 

 black on last two segments (New Caledonia). 



albomarginata Sm. 9. 

 No such white spots ; abdomen of the parallel-sided type 7. 



7. Very large; over 20 mm. long; wings deep fuliginous; scopa yellowish white; 



mandibles with three apical teeth, and a nodule on inner side; cly- 

 peus with a great projection on each side; cheeks with a great tooth 

 beneath ; claws with a double basal denticle, consisting of a long tooth 



with a little one mesad of it (Champion Bay) moustrosa Sm. 



Smaller, 15 mm. or less ; scopa white ; females 8. 



8. Witigs darkened; base of abdomen with conspicuous white hair; base of 



antennae not red (Australia) liiciriivciitris Sm. 



Wings nearly clear; base of anteunee (including all of scape) red; front cov- 

 ered with orange-fulvous hair :m ri Irons Sm. 



The Indian M. imitatrix Sm. very closely resembles the Austra- 

 lian M. ustulata. 



M. rufiventris Guer., Sm., from Rodriguez, very closely resembles 

 the Australian M. mystacea, and is perhaps not separable. 



Megacliile alecto Sm. 



The Museum contains both sexes from Dorey. The male has 

 the abdomen black, with a dull reddish apical area, and no white 

 hair-patches; apex broadly emarginate ; lower half of clypeus, and 

 area between antennae, with yellowish hair, face otherwise black,, 

 The type was a male ; the female has the marginal cell longer, and 

 the third s. m. longer and lower, and is perhaps not conspecific. It 

 also has darker wings than the male. 



