Mr. F. Smith on new Species of Fossorial Hymenoptera. 441 



lector came across them at the Treasury, situated at the oppo- 

 site side of the city. The specimens vary a little in the width 

 of the black border and the number of the white spots in it, 

 but to no greatei' extent than in the American specimens with 

 which I compared them. 



This sudden American invasion of the whole continent 

 seems worth recording. 



Melbourne, March 26, 1873. 



LII. — Descriptions of new Species of Fossorial Hymenoptera 

 in the Collection of the British Museum. By FliEDEKiCK 

 Smith, Assistant in the Zoological Department, British 

 Museum. 



The species described in the present paper were collected by 

 Mr. H. W. Bates in the Amazons Valley, in Brazil, and 

 formed part of his private collection ; they were purchased by 

 the Trustees of the British Museum, and are nearly all unique 

 in tlie National Collection. The most valuable additions made 

 to the Fossorial tribe are the species now added to the following 

 genera : — to Geropales four species, to Aporus three, to Amjjulex 

 one, to Trigonopsis two, and to Trachypus two ; many new 

 and beautiful additions are made to the Pompilidse, Larrid», 

 Crabronidae, and the Philanthidfe. 



Tribe Fossores, Latr. 

 Family Pompilidae. 



Genus Pompilus, Fabr. 



Pompilus fervidus. 



Female. Length 7 lines. Ferruginous, with the wings 

 fuscous. Head : the eyes, ocelli, tips of the mandibles, and 

 the seven apical joints of the antennop,, as w^ell as the eighth 

 joint above, black. Thorax : the posterior margin of the pro- 

 thorax, the tcgulaj, postscutellum, and the posterior margin 

 of the metathorax yellow ; the wings dark fuscous and iri- 

 descent, with their apical margins and hinder margin of the 

 posterior pair paler ; the tibite and tarsi with ferruginous 

 spines. Abdomen with the apical margins of the segments 

 bordered with fusco-ferruginous bands, indistinctly defined. 



Hah. Para. 



