HYMENOPTERA. 281 



The example in the Museum Collection agrees with the de- 

 scription of St. Fargeau in every respect excejjt a slight differ- 

 ence in the sculptiu-e of the metathorax, which is finely trans- 

 verse-striate and coarsely ridged at the sides, the truncation 

 transversely grooved. 



22. Larrada tarsata, 



Lyrops tarsalis. Spin, Ann. Soc. Ent. Fr. vii. 4/8. 27 <? (1838). 

 Hab. Egypt. 



23. Larrada geniculata. 



Lyrops geniculata, Spin. Ann. Soc. Ent. Fr. vii. 480. 29 $ (1838). 

 Hab. Egypt. 



24. Larrada erythropus. 



Lyrops erythropus, Spin. Ann. Soc. Ent. Fr. vii. 4/9. 28 ? (1838). 



Hab. Egypt. 



This may possibly be identical with the L. pallipes ; but 

 Spinola does not mention the sculpture of the metathorax, which 

 in this genus appears to offer the best specific distinctions. 



25. Larrada Memnonia. B.M. 



Female. Length 7 lines. — Black : the face covered with silvery 

 pubescence, the mandibles obscm-ely rufo-piceous, the apical 

 joints of the palpi pale testaceous. The thorax covered with a 

 fine silvery pile, as well as the legs ; the tarsi and apex of the 

 tibiae ferruginous; the wings fulvo-hyaline, the nervures and 

 tegula; behind rufo-testaceous ; the scutelhim smooth and shining; 

 the metathorax finely transversely striated, and having a central 

 abbreviated carina not extending to the verge of the truncation, 

 the stria; coarser at the sides, the truncation also coarsely striated. 

 The apical margins of the segments of the abdomen with fascisp 

 of changeable silvery jnle. 



Hab. Egypt; Senegal. 



26. Larrada obliqua. B.M. 



Female. Length 4 lines. — Black : the face thinly covered 

 with silvery pubescence. Thorax : the mesothorax very closely 

 and finely punctured, as is also the scutellum ; the metathorax 

 with a central impressed line which extends to the verge of the 

 truncation ; on each side the disk is obhquely striated ; the trun- 

 cation transversely striated, and having a central carina which 



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