Cirrops berbericus sp. n. is described from Morocco and compared to Cirrops kumari Tjeder, 1980 from Gambia and Ghana. Bubopsis costai Navas, 1913 (syn. n.) is a junior synonym of Bubopsis ...agrionoides (Rambur, 1838).
Regulation of light flux by pupil mechanisms in the UV-sensitive superposition eye of owl-fly Ascalaphus macaronius (Neuroptera) was studied with a fast reflection microspectrophotometric technique. ...The spectral sensitivity of pupil reaction, which was calculated on the basis of changes of transient amplitude reflection, was almost identical with the one of Deilephila eye. This indicates that in spite of different life styles and spectral sensitivities of photoreceptors, pupil closing is triggered by the same photosensitive structure in both eyes. By measuring the spectra of reflected light from the Ascalaphus eye between 400 and 700 nm after different dark periods following light stimulation, it was established that the restoration of reflection was much faster in the red than in the blue spectral range. Based on this, we propose that two different pupil mechanisms with different spectral absorption characteristics are involved in light-flux regulation. Fast-reacting pupil is probably represented by screening pigment migration in the secondary pigment cells and a slow blue-absorbing system by the activity in primary pigment cells. The importance of two different pupils for the photoregeneration of visual pigment is discussed.
Strixomyia manselli, a new genus and species of owl-fly (Neuroptera: Ascalaphidae) from Namibia and the south western Cape Province, South Africa, is descriptionbed and illustrated.
Strixomyia manselli, a new genus and species of owl-fly (Neuroptera: Ascalaphidae) from Namibia and the south western Cape Province, South Africa, is descriptionbed and illustrated.
