72 PROCEEDINGS OF THE ACADEMY OF [1898. 



CONTRIBUTIONS TO A KNOWLEDGE OF THE HYMENOPTERA OF 

 BRAZIL, NO. 4.— THYNNINJE AND ADDITIONS. 



BY WILLIAM J. FOX. 



The author has withheld the publication of the present paper for 

 some time in the hope that an opportunity would preseut itself for 

 the classification of the true Mutillidse in the collection of Mr. H. H. 

 Smith, and thereby avoid the inconvenience of listing the Mutillidse 

 in more than one paper. Circumstances, however, will not permit 

 the carrying out of such a plan, so he feels obliged to present this 

 paper for publication, even though it deals with but a part of one 

 family. 1 



*lElurus carbonarius Sm. {==Elaphroptera carbonaria Sm.) 



Four specimens. Rio de Janeiro (November). 



iElurus aethiops King. {=Thynnnn aethiops Klug"). 



The description of this species as given by Klug will fit what I 

 have determined as Smith's Elaphroptera carbonaria, as will also 

 Klug's description of Thynnus anthracinus. The specimen I refer 

 to aethiops is larger and heavier than carbonarius, and is more 

 coarsely punctured. It is probable that carbonarius is the same as 

 anthracinus, but the descriptions of both are so poor that nothing 

 conclusive can be determined from them, except their faultiuess. 

 The specimen in question comes from Rio de Janeiro (November). 



JElurus nasutus Klug. 



Two specimens. Rio de Janeiro (November). 

 Elaphroptera sp. 



Two specimens (?) of a species apparently close to Thynnus 

 intermedins Klug. They are smaller than that species. Collected 

 in September at Chapada. 



Elaphroptera decora Sm. (—Thynnus decorus Sm.) 

 One specimen. 



'See Entomological News, IX, 1, Jan., 1897, p. 14. 



J sElurus carbonarius and AL. aethiops differ from typical sElurus (A. nasu- 

 tus) in the bidentate mandibles, in the third submarginal being longer than 

 second, in the emarginate or bidentate clypeus and comparatively shorter 

 maxillary palpi, in which joints 4-6, while much longer than the preceding 

 ones, are still not as long as in A. nasutus. 



