130 Psyche [Vol. 93 
1982), as already assumed for nocturnal species of the genus Tro- 
chosa (Engelhardt, 1964). 
Semiochemicals play an indispensible role in spider communica- 
tion. Locating sites of pheromone production and perception is 
essential for understanding behaviours and morphological adapta- 
tions of sexual significance. 
Specimens of Alopecosa cuneata (Clerck), A. pulverulenta 
(Clerck), Pardosa fulvipes (Collett), and Trochosa spinipalpis 
F.O.P. -Cambridge were all collected in pitfall traps with formalin in 
the vicinity of Stockholm, Sweden. The material was stored in 
ethanol, and parts used for SEM were dehydrated in an ethanol 
series, kept in xylene for one or two days, cleaned in ultrasonic 
cleaner, air-dried, mounted on SEM stubs, and sputter-coated with 
Pd-Au. Examination was carried out with a JEOL JSM-35 at 15kV. 
Summary 
The cuticle of lycosid spider legs is shown to be equipped with 
pores presumably involved in the release of sex pheromones. The 
pores occur in both sexes. The male of Alopecosa cuneata has an 
increased number of pores on its first tibiae, and the premating 
behaviour in this species speaks in favour of the male producing 
some aphrodisiac from the leg pores. 
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