Sinclair, Bradley J., Borkent, Art & Wood, D. Monty, 2007, The male genital tract and aedeagal components of the Diptera with a discussion of their phylogenetic significance, Zoological Journal of the Linnean Society 150 (4), pp. 711-742: 722

publication ID 10.1111/j.1096-3642.2007.00314.x

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Description ( Fig. 2B View Figure 2 )

Testis: Each testis is oval and pale ( Philorus Kellogg   ) or club-shaped, bent and twisted, and darkly pigmented ( Zwick, 1977).

Epididymis: Not differentiated.

Vas deferens: These ducts are long and slender and extend directly to the sperm pump ( Philorus   ) or are non-existent when the testis is rather elongate and empties directly into the sperm pump ( Zwick, 1977).

Accessory gland and seminal vesicle: There are one to two pairs of pale glands, which empty separately at the base of the elongate testes ( Zwick, 1977). The contents and function of these glands are unknown. No glands were observed in Philorus   .

Ejaculatory duct: The ducts exiting the testis remain completely separate for their entire length and empty separately and directly into the sperm pump ( Zwick, 1977; Sinclair, 2000: fig. 1). There appears to be no distinction between the vas deferens and the ejaculatory duct.

Ejaculatory apodeme, sperm pump, and aedeagus: The base of the aedeagus bears an enlarged ejaculatory apodeme, which compresses the sperm pump ( Sinclair, 2000). The aedeagus in Blephariceridae   is divided posteriorly into three narrow forks, with each narrow tube opening independently ( Fig. 2B View Figure 2 ).

Remark: The male genital tract of this family was studied by Zwick (1977).