172 
ALGERIA 
a distinct, or fairly strong, rich, sweet scent, which I compared to 
that of Ereesia—some lady friends compared it to that of Gorse, 
Syringa, or Primrose; on the other hand, in ten males of rhamni 
examined there was either no scent to be detected, or something very 
faint and unlike Freesia. Such a marked physiological difference 
between two forms by many regarded as nonspecific is very remark¬ 
able and needs further investigation. 
Thais rumina was common just before I left, it appeared to be 
but little attracted by flowers. No two were quite alike, the scarlet 
markings being especially variable. 
I saw two or three Papilio podalirius , Linn., before March 26th, 
but by the 29th it was fairly common. This magnificent butterfly 
was most easily secured at the flowers of Hawthorn or Pear, the latter 
proving to be especially attractive to it. 
On some evenings the electric lights at the hotel entrance attracted 
a considerable number and variety of moths. Of Zygaena ludicra , 
Lucas, and Lymantria atlantica, Ramb., I got but one each; of 
Hemerophila abruptaria, Thunb., three; Idaea virgularia , Hiibn., two; 
1. marginepundata , Goze, one; Melanippe fluduata , Linn., one; five 
specimens of a Larentiid, (?) Cidaria sp., which does not appear to be 
represented at South Kensington; Eupithecia pumilata , Hiibn., one; 
E. innotata, Hiibn., three; a specimen of a Boarmiid not in the 
National Collection; Cirphis albipunda, Fabr., one; Caradrina 
guadripundata, two ; Agrotis puta, Hiibn., one; Euxoa (?) nigricans , 
Linn., one; Laphygma exigua, Hiibn., one; Nodua C-nigrum , Linn., 
one ; Cloantha polyodon, Clerck (perspicillaris, Linn.), one ; Calophasia 
platyptera, Esp., one; Cucullia chamomillae, Denis, three; Xylocampa 
areola , Esp. ( lithorrhiza, Bork.), one ; Thalpochares ( Micra) ostrina , 
Hiibn., one; Plusia gamma, Linn., four; the Quadrifid, Apopestes 
cataphanes, Hiibn., two; Scoparia angustea, two; the Phycid, Acro- 
basis obliqua , Zell., three; and the Tineid, Anesychia bipundella, 
Fabr., two. 
The following moths were found by day :—Aspilates ochrearia, 
Rossi ( citraria, Hiibn.), one kicked up ; Plusia gamma at flowers; 
Scopula ferrugalis , Schiff., one disturbed ; Zygaena ludicra at flowers 
of Asphodel; Nemophora pilella, Schiff. & D. in the pine wood. 
Along the winding roads through the Foret de Chaiba the webs 
of the larvae of Cnethocampa processionea , Linn., were much in 
evidence, and the larvae themselves were often seen marching across 
the track. One such procession was carefully observed. The column 
consisted of 121 larvae marching in Indian file; they formed a 
waving line across the road, the small deviations from the straight 
