1904.] 219 



with. T am deeply indebted to him for the carefully detailed obser- 

 vations which have accompanied his generous contribntions to my col- 

 lections from these and other localities. 



The botanical nomenclature ado[)ted in this paper is that of 

 Professors Battandier and 'I'rabut, joint authors of the " Flore de 

 I'Algerie," to the latter of whom I desire to express my thanks, as also 

 to the botanical staff of the British Museum (Natural History) for 

 valuable assistance rendered in determining specimens. 



HYPONOMEUTIDAE. 



298.— CEROSTOMA, Ltr. 



245G : 1. -Cerostoma indecorella, Rbl. 



Oerostoma indecorelJn, Rbl. Verb. Z.B. Ges. Wien., LIT I (1903), 

 410—11, No. 34 (1903). 1 



Antennae white, barred above with brownish grey. Palpi projecting more than 

 tlie length of tlie head beyond it, clothed with long rough hair-scales forming a some- 

 what cone-shaped brush, from near the base of which tlie sliort terminal joint 

 protrudes obliquely ; white, dusted with black scales. Head and Thorax dull 

 white, the latter very slightly dusted. Forewings elongate, with moderately acute 

 apex, not falcate and scarcely depressed ; dull white, slightly shaded along the 

 dorsal and terminal areas with very pale brownish grey and much spotted and 

 streaked with sooty black ; on the basal third, and a little beyond it near the fold, 

 the black spots are arranged somewhat transversely, some crossing the fold but not 

 reaching the dorsum, thus giving to the base of the wing a strong chequered appear- 

 ance ; from the middle of the fold and along and above the cell are black, longitu- 

 dinal lines following the venation, but beyond the cell they become somewhat 

 suffused and partially coalescent ; a black transverse spot lies at the end of the 

 cell, three or four small spots on the middle of the costa and a somewhat confused 

 series of rather larger spots around the apex and termen, those before the apex 

 running through the cilia, those below the apex followed by some minute black 

 dusting on the cilia which are otherwise white, blending to brownish grey at the 

 tornus. Exp. al., 19 — 23 mm. Ilindioings shining, very pale pearly grey, with 

 even paler cilia ; the termen is very slightly sinuate below the produced apex. 

 Abdomen shining, pale brownish grey. Legs white, the tarsi with black dusting 

 on their underside. 



Hab. : ALGEETA— Biskra, 24.TII— 21. 1V.1903 ; TTammam-es- 

 Salahin, 18.IV.1903 ; El-Kantara, 5.V.1903 ; Ouargla-Ghardaja (Ham- 

 mada), 12.IV.1S93.1 



I took fifteen specimens of this species at BisKra, Ilanimam-es- 

 Salahin, and El-Kantara, some at light and some beaten from bushes 

 of Nilrnrin tridentata, with which they ai^pear to be associated. It 

 is a variable species, some specimens being devoid of the basal 



