ARABIAN HYMEN OPTERA. 21 



100. Larrada nigrita. Tachytes nigrita, St. Farg. Hym. iii. 24=1. 

 Cairo. Wady Ferran. Mount Sinai. 



Inhabits Madeira. 



101. Larrada Oraniensis. Tacbytes Oraniensis, St. Farg. 

 Hym. iii. 



Tajura. 



102. Larrada nigricans. Male and female. — Black, dull, 

 ■witb cinereous tomentum. Head a little broader than the thorax, 

 silvery in front and behind. Petiole very short. Abdomen elliptical 

 in the male, elongate-oval in the female. Wings blackish cinereous, 

 blackish towards the tips ; veins black. Length of the body 4 — 6 

 lines. 



This species is a little smaller and has paler wings than L. nigrita, 

 which it much resembles. 



Cairo. Hor Tamanib. 



103. Larrada subfasciata. Female. — Black, with cinereous 

 reflections. Head a little broader than the thorax, silvery behind and 

 in front. Hind part of the metathorax striated, with a longitudinal 

 furrow. Petiole very short. Abdomen elongate-oval, with four 

 widely interruj)ted silvery bands. Tarsi dark red. Wings cinereous ; 

 veins black. Fore wings dark cinereous along the exterior border. 

 Length of the body 6 hnes. 



Cairo. 



104. Larrada conjungens. Female. — Black, with . silvery 

 cinereous tomentum. Head silvery in front and behind. Mandibles 

 black. Petiole black, very short. Abdomen red, elongate- oval, 

 longer than the thorax, with four silvery patches on each side ; apical 

 segment gilded above. Legs with silvery tomentum ; hind femora 

 dark red. Wings pellucid ; veins tawny. Length of the body 

 7i lines. 



Dahleck. 



105. Larrada diversa. Female. — Black, with silvery cinereous 

 tomentum. Head silvery in front and behind. Mandibles black. 

 Metathorax finely and transversely striated, with a slight longitudinal 

 furrow. Petiole black, very short. Abdomen red, elongate-oval, a 

 little longer than the thorax, with three silvery patches on each side ; 

 second segment with a black oblique streak on each side; fourth, 



