189S.1 179. 



24. A. patruelis, (Sturm.). — North of Bone, on the Route de Bugeaud, and Bis- 

 kra, from August to December ; very common. 



25. Sphingonotus cmrulans, (L.). — Very common on the low stony hills north 

 of Biskra, in November. 



26. S. Savignyi, Sauss. — On the alluvial flat ground near Hamman-es-Salahin, 

 Biskra, in April. 



27. "S. azurescens, (Ramb.). — Abundant on the sands near the sea shore beyond 

 the Seybouse, Bone, in September. 



28. S. octofasciatus, (Serv.). — Abundant near Biskra on the railway in April 

 and May. 



29. (Edaleus nigrofasciatus, (De Geer.). — One at the mouth of the Seybouse 

 near Bone, in March ; one in November at Biskra, but from May locally abundant. 



30. Pachytylus danicus, (L.). (:= cinerascens, Fabr.). — Near Bone it is common 

 on the coast and on the elopes of the spur of Mt. Edough among the grass in Sep- 

 tember. At Biskra it is fairly common on the pastures in the same month. " The 

 males in play sometimes spring up to a height of 10 or 12 feet into the air, making 

 a noise with their wings as if their hind legs were struck against them, and alighting 

 nearly in the same spot whence they sprang." 



Eeemobid^. 



31. Eremoiia CTosjjeZi', Luc — Hamman-es-Salahin, a hot spring five miles from 

 Biskra, in April ; local, inhabiting sandy places among Limoniastrum Guyonianum. 



32. Eremocharis insignis, (Luc). — Common on the low stony hills north of 

 Biskra in June, and difficult to distinguish when motionless among the grass. 



Ptegomoephid^. 



33. Pyrgomorpha grylloides, (Latr.). — Occurs here and there on patches of 

 sandy soil not incrusted with salt, near the Pare de Beni Mora, Biskra, in February 

 to April, and in November ; nowhere abundant. 



ACEIDIID^. 



34. Dericorys Millieri, Finot. — On the alluvial soil near the Biskra railway, 

 about kilometre 200, frequenting bushes of Salsola tetragona in the hollows, in 

 April and May ; moderately common. 



35. Acridium mgyptium, (L.). — Fairly common near Biskra in October, fre- 

 quenting gardens and iri-igated pastures. 



36. Schistocerca peregrina, (Oliv.). — "In 1897 hordes of this species began to 

 be mentioned in Algerian newspapers soon after Christmas as troublesome in the 

 extreme south. Moving in northerly directions, some arrived during February at 

 Tougourt, about 100 miles south of Biskra, whence consignments were sent fried in 

 oil to the Biskra market, three weeks or so ahead of the immigration into this oasis. 

 Another fortnight sufficed for their extension to the coast. They take some time 

 to mature their eggs, . . . and undergo a change of coloration with advance 

 of age." The yellowest specimens appear to be the oldest. 



37. Euprepocnemis florans, (Charp.). — Abundant near Bone from September to 

 November, along the coast beyond the Seybouse, among Chameerops humilis, and on 



