Annals of tropical medicine and parasitology . t, 1906. (R. Newstead.) Lynchia main a, Bigot(Fig. 6) Polypneiistic lobes with three large bilateral marginal extensions,those on either side of the anus somewhat angular, the others broadlyrounded and strongly produced; margin of all extensions stronglyundulating or wavy. Anal stigmata occupying a sub-centralposition with the micropylar process between them. The super-numerary stigmata are relatively small, and number about forty-sixon either side; the connective tubes are relatively long, but fairlyrobust. The tracheal trunks relatively narrow,
Annals of tropical medicine and parasitology . t, 1906. (R. Newstead.) Lynchia main a, Bigot(Fig. 6) Polypneiistic lobes with three large bilateral marginal extensions,those on either side of the anus somewhat angular, the others broadlyrounded and strongly produced; margin of all extensions stronglyundulating or wavy. Anal stigmata occupying a sub-centralposition with the micropylar process between them. The super-numerary stigmata are relatively small, and number about forty-sixon either side; the connective tubes are relatively long, but fairlyrobust. The tracheal trunks relatively narrow, and consisting ofthree very widely divergent branches, each branch supplying thestigmata along the wavy margin with lateral connective tubes; thedorsal and ventral branches {d. I. tru. and v. tr. tru.) have each abackwardly directed branch whose terminal stigmata lie ver^ nearto the anal stigmata. 105 Owing to several large fractures in my preparation I cannot tracethe commissure of the tracheal trunks with the main stigmata, but V. ir. Fig. 6. Lynchia niaura : Polypneustic lobes of young adult larva : d. I. trii.,dorsal tracheal trunk ; v. ir. irii., ventral tracheal trunk. Right sidetransposed, dotted lines = lines of restoration. I have indicated its probable course by dotted lines as it is possiblethat the union of the tracheal trunks with the abdominal trachealsystem may be similar to that in Hippobosca uiacnlata (fig. 5)- Melophagus ovinus(Fig. 7) Polypneustic lobes. The lobes in this species are quite rudi-mentary though very clearly defined. Near the centre of each lobeis a large, deep, circular and cup-shaped depression; inside this pitor open chamber is placed, near the lower portion of the wall, thewell-defined main abdominal stigma {a. si.), rendered mostconspicuous by its clear circular opening; near the edge of the pit io6 are two slightly larger stigmata {st. i. and st. 2.), and one veryminute one {st. 3.); on the outer lateral side of the pit is anotherla
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectparasites, bookyear19
