. 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;. Blowflies. I40 THE INTEGUMENTAL SKELETON OF THE IMAGO. The separation of the sclerites forming the upper and lower surface of the labrum gave rise to the view that one pair repre- sent the labrum and the other the epipharynx. As the labrum does not consist of a single plate in any insect, but is always a hollow process, this is not a tenable view (Kraepe
. 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;. Blowflies. I40 THE INTEGUMENTAL SKELETON OF THE IMAGO. The separation of the sclerites forming the upper and lower surface of the labrum gave rise to the view that one pair repre- sent the labrum and the other the epipharynx. As the labrum does not consist of a single plate in any insect, but is always a hollow process, this is not a tenable view (Kraepelin [70]). The external (dorsal) pair of sclerites are fused together at their proximal extremity, where they articulate with a pair of. Fig. 29.—/, A section throao;h the moutli in the plane a little below that marked by the line pi, Plate VI. : m, cavity of the prelabrum containing muscles ; a, edges of the groove in the theca ; d, dorsal, and o, oral sclerites ; /, the ligula and salivary duct ; h, the hypoglossa, and pa, the paraphysis. The cavity c is cut off from the alimentary tube when the ligula is brought into contact with the labrum ; it is indicated by the letters st in Plate VI. 2, A section through the anterior dorsal edge of the oral sucker, showing the dislocated bead and furrow which closes the prestomum and the lower edge of the hypoglossa ; the lips are strongly flexed on the theca : h, hypoglossa ; pa, paraphysis ; d s, discal sclerile ; //, pseudotrachese; pst, prestomum. j, A section through the haus- tellum near the plane sg in Plate VI. : //, prelabrum ; /// s, thyroid shield ; w^ to iii^, muscles in the cavity of the theca ; e, elastic band. The ligula is seen between the hypoglossa and the prelabrum. apodemes—the glosso-pharyngeal apophyses of Straus Durck- heim already referred to (Fig. 27, ap). These lie in the cavity of the rostrum, and are the 'nail-like pieces' which Gerstfeldt thought analogous to the cardines of the maxillae. As the cardines
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1890
