Fig. 47
From: Revision of the Atratus Group of Culex (Melanoconion) (Diptera: Culicidae)
Couplet 2: head features, siphon and siphonal pecten spines. Arrows indicate head setae, siphon setae and siphonal pecten spines. a-c Thesis: Culex trigeminatus, setae 5 and 13 of the head (a), siphonal setae (b) and siphonal pecten spine (c). d-f Antithesis: Culex ensiformis, setae 5 and 13 of the head (d), siphonal setae (e) and siphonal pecten spine (f). Abbreviations: S, siphon; PS, siphonal pecten spine