. The Cambridge natural history. Zoology. 44S ARACHNIDA PHALANGIDEA chap. family, Gibocellidae, for its reception. No one else appears to have seen the animal, or any of Stecker's preparations of it, and Hansen and Sorensen ^ adduce grave reasons for believing that it never existed at all. If this species is to be disallowed, the Cyph- ophthalmi all fall into a single family. Fam. Sironidae.—These somewhat Mite- like Phalangids are rarely met with, partly, no doubt, because of their retiring habits and small size, the known forms ranging- Fig. 23S. — Parasiro from 6 mm. to less than 2 mm. in l
. The Cambridge natural history. Zoology. 44S ARACHNIDA PHALANGIDEA chap. family, Gibocellidae, for its reception. No one else appears to have seen the animal, or any of Stecker's preparations of it, and Hansen and Sorensen ^ adduce grave reasons for believing that it never existed at all. If this species is to be disallowed, the Cyph- ophthalmi all fall into a single family. Fam. Sironidae.—These somewhat Mite- like Phalangids are rarely met with, partly, no doubt, because of their retiring habits and small size, the known forms ranging- Fig. 23S. — Parasiro from 6 mm. to less than 2 mm. in length, f"™''"!;. ^larg'^'i- Of the seven genera which have been estab- (After Simon.) _ o lished, Stylocellus numbers eight species from Borneo and Sumatra, and Pettalus two species from Ceylon. Ogovia, Ifiopsalis, and Purcellia have one species each, from South Africa, Further India, and the Cape, respectively. The only European forms are the two species of Siro (France and Austria), and Parasiro corsicus. No species has yet been found in England. Sub-Order 2. ; (laniatores). Sternum long and narrow. Dorsal scutum leaving at least the last three segments free. 02Jenings of odoriferous glands not on prominences. The fourth pair of legs usually long and powerful. One terminal clatv on each of the first two pairs of legs ; two on the last two pairs. The Mecostethi are essentially tropical forms, though a few representatives are found in the caves of Southern Europe. One family (Phalangodidae) has its headquarters in the hot regions of the Old World, while the other two (Cosmetidae, Gonyleptidae) are confined to Central and South America. Fam. 1. Phalangodidae.—Body p)iriform or triangular, h'oadest hehind. Last ventral segment of abdomen much the largest. Very narrow sternum. Eye-turret near anterior border of cephalothorax. Ohelicerae narrow at base. Pedipalpi long and strong. Maxillary plates on first jM-ir of legs rudimentary. No stigmata visi
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
