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XVIII. Descriptions of New Genera and Species of Exotic 

 Hymenoptera. By Frederick Smith, V.-P. and 

 late Pres. Ent. Soc. 



[Bead 7th June, 1869.] 



The majority of the insects described in the present paper 

 are in the British Museum; all are of great rarity, and 

 some present such new combinations of characters that I 

 have found it necessary to construct four new genera for 

 their reception ; several of the species described are in 

 Mr. Du Boulay^s private collection of Hymenoptera, lately 

 purchased for the National Museum. I hope shortly to 

 offer to the Society descriptions of some of the Apidce in 

 the same collection, which contains several insects which 

 will form types of new genera. 



Fam. MUTILLID^. 



Genus Methoca. 

 Methoca mandihularis. 



Male. Length 1\ lines. Black, shining and punctured, 

 the mandibles yellow. 



Head : shining, and strongly punctured ; the face and 

 mandibles with long white hairs, those on the rest of the 

 head are shorter and thinner; the antennae as long as the 

 thorax and first segment of the abdomen ; the anterior 

 margin of the clypeus rounded, and with a notch in the 

 middle; the mandibles yellow, with their apex nigro- 

 piceous. Thorax coarsely punctured, the punctures close 

 and more or less confluent on the metathorax, on the 

 pro- and meso-thorax they are wider apart, but coarse, 

 and here and there confluent ; the metathorax with a 

 central longitudinal channel, and, as well as the thorax 

 beneath, thinly clothed with hoary pubescence ; the legs 

 obscurely rufo-piceous ; wings subhyaline, darkest towards 

 the apex of the wings, a fuscous cloud occupies the mar- 

 ginal cell; the nervures black. Abdomen: finely and 

 distantly punctured, the punctures strongest towards the 

 apex; the petiole of the abdomen compressed, and with a 

 thin sharp edge ; the first segment globose at the apex, the 



TRANS. ENT. SOC. 1869. PART IV. (aUGUST) . 



