528 ]\Ir. T. D. A. C'ockercll — Descriptiori.'i and 



l)l;ick or red, white being quite an uncommon colour. With 

 these characters go others, not readily expressed in a few 

 words. 



Femaks. 

 Abdomen entirely bnght red, or only part 



of first segineiit black 1. 



Abdomen not red, or at most with the 



apex red 2. 



1. Small ; the red not due to tomentura .... M. abdominalis, Sm. 

 Larger; the red due to tomentum M. mijstacea, Fabr. 



2. Ventral scopa entirely black ; large black 



species, with deep fuliginous wings .... M, Doddiana, Ckll. 

 Ventral scopa bright red ; abdomen with 



purple or green tints M. pictioentris, Sm. 



Ventral scopa white or nearly so, often 



with black at e.xtreme apex 3. 



3. Apex of abdomen <\'ith the tegument red . 4. 

 A pex of sibdomen with the tegument not 



red o. [Sm.* 



4. Larger ; marginal cell sharply pointed . . Lithurgm rubricatus, 

 Smaller ; marginal cell rounded at apex. . M. modesta, Sm. 



5. Wings fuliginous or smoky, with the base 



light; abdomen black, without bands, 

 but the first segment with white hair . . 6. 

 Wings hyaline or dusky ; when the latter, 

 abdomen conspicuously banded 7. 



6. Length about 17 mm. ; clypeus with a 



great process on each side M. monstrosa, Sm. 



Length about 12 mm.; clypeus without 

 such processes M. suffusipennis, Ckll. 



7. Ventral scopa entirely white ; cutting- 



edge of mandibles covered by a fringe of 



fulvous hair M . fuhomurginata^ Ckll. 



Ventral scopa with some black hairs on 

 apical segment, at least 8. 



8. Mandibles mainly red ; size small, length 



about 10 mm. ; sides of ventral scopa 



practically without black hairs M. atrella, Ckll. 



Mandibles black ; size larger, or, when as 

 small, sides of ventral scopa with con- 

 spicuous black hairs 9. 



.). Ilair of top of head nchreous, or, at least, 

 nearly all so ; sixth abdominal segment 



covered with ochreous tomentum; abdo- \{maculala,^m.), 



nif-n conspicuously banded M. macularis, D. T. 



Hair of top of head black or dark fuscous. 10. 

 10. Abdomen parallel-sided, the hair-bauds 

 orange in the middle, and a patch of 

 orange tomentum occupying part of tifth 

 and sixth segments M. JIampsoni, Ckll. 



* The specimen of Lithurgits rubricatus (labelled simply " Australia ") 

 before me differs from the type in having distinct pulvilli. I do not 

 think it is a different species, but rather that the pulvilli are sometimes 

 evident and sometimes not, according to the condition of the specimen. 



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