Archive image from page 463 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9875 Year: 1890 ( 74° THE GENERATIVE ORGANS. sternum in front and with the sides of the penis internally. They are undoubtedly the homologues of the great claspers of the male Hymenoptera, and of the so-called external sheath of the penis. Their position immediatel
Archive image from page 463 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9875 Year: 1890 ( 74° THE GENERATIVE ORGANS. sternum in front and with the sides of the penis internally. They are undoubtedly the homologues of the great claspers of the male Hymenoptera, and of the so-called external sheath of the penis. Their position immediately behind the progenital sternum shows that they are the lateral appendages of the progenital or mesogenital somite, and their developmental history, as well as the position of the claspers in the Hymen- optera, renders it almost certain that they are appendages of the progenital somite. In this case they clearly correspond with the inferior blades of the ovipositor in Locusta viridissima. The Penis in the Muscidie is a very complex organ. It con- sists of a membranous, papilla-like projection from the thin Fk;. 105.—A transverse section of the penis of a Blow-fly. /;/, hypophallus ; //, integument of the roof of the genital sinus, at the extremity of which the ejaculatory duct opens externally. This membranous papilla contains a large blood sinus and is capable of erection ; it is supported and protected by a com- plex chitinous framework, which consists of a pair of para- phalli enclosing its base, and of a large, curved, ventral plate, which I shall term the hypophallus. Desckh'tion of Plate LII. View of the penis from its under surface ; b, bulb; g, anterior ; /;/, hyi)ophallus ; //, paraphalhis ; 0, orifice of ejaculatory duct ; ;', ridges of epipleura.
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