HYMENOPTERA. 281 



The example in the Museum Collection agrees with the de- 

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

 ence in the sculpture 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. 478. 2/ <? (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, 479. 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 witli silvery 

 pubescence, the mandibles obscurely rufo-piceous, tht.> 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 

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

 tegulffi behind rufo-testaceous; the scutellum smooth and shining; 

 the metathorax finely transversely striated, and having a central 

 abbreviated carina not extending to the verge of the truncation, 

 the striffi coarser at the sides, the truncation also coarsely striated. 

 The apical margins of the segments of the abdomen with fascia) 

 of changeable silvery pile. 



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 obliquely striated ; the trun- 

 cation transversely striated, and having a central carina which 



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