. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 142 A. M. H e m m i n g s e n Bonn, zool. Beitr. If the position during copulation of basistyle (1—2) and dististyle (5) can be inferred from their homologues in Ph. hemmingseni, 5 might grasp about the cerci or ">stalk", but 2 would be too short to reach its counter- part on the other side. However, when the hypopygium of a pinned male is viewed from be- hind the rather long hairs on the upper ro'unded edges of 2, as well as the less numerous hairs on
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 142 A. M. H e m m i n g s e n Bonn, zool. Beitr. If the position during copulation of basistyle (1—2) and dististyle (5) can be inferred from their homologues in Ph. hemmingseni, 5 might grasp about the cerci or ">stalk", but 2 would be too short to reach its counter- part on the other side. However, when the hypopygium of a pinned male is viewed from be- hind the rather long hairs on the upper ro'unded edges of 2, as well as the less numerous hairs on 1, are seen to be curved inward, and from either side 5 meet below in the middle. Thus it might seem to be equally possible. E. N. Kristiansen del. Fig. 4. The right part of the hypopygium of Pihyllolabis mannheimsiana. Drawn from preparation in Canada balsam. The numbers homologize with fig. 1. 8 (like 9) extends mesially but is here bent backward; in ñg. 1, forward. that 2 with its hairs from each side grasps about the cerci or stalk, 5 rub- bing their underside. The more hindward directed position of 2 and more downward directed position of 5 in Ph. mannheimsiana (fig. 4) than in Ph. hemmingseni (fig. 1) seems to be quite favourable to this possibility. But only direct observations can decide the point. Acknowledgements A visit to the Canary Islands made also for other purposes was supported by a grant from the Carlsberg Foundation. My sincere thanks are offered for this as also to Nordisk Insulinlaboratorium and Nordisk Insulinfond, especially through. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
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