Hippocrates says, that when pregnant women long to eat coals and earth, the likeness of these things appears on the head of the child. (De Superfœt. c. 8.) Galen likewise believed in the influence of the imagination of pregnant women on the fœtus _in utero_. (Ad Pison.) Soranus also was a firm believer, and gives instances in women and in the inferior animals of the force of imagination at the time of impregnation. (lib. vii.) This belief was very ancient, for it appears to be countenanced by the Jewish historian. (See Genesis, xxx, 37-9.) Traces of this opinion may be found in Hesiod; and distinct allusion to it is made in the ‘Cynegetics’ of Oppian. (i, 327.) The story in the ‘Æthiopics’ of Heliodorus respecting Chariclea, the white daughter of the black king and queen of the Æthiopians, bespeaks the prevalence of the belief at the time when this celebrated romance was written. Andreas Laurentius gives an interesting statement of ancient and modern opinions on this subject. (De Mirab. Strum. Sanit.) The bird _pica_ is mentioned by name (κίττα) in the ‘Aves’ of Aristophanes. (See also Schol. in Aristoph. in Pac. 496, and Vesp. 348; Aristotle, Hist. An. vii, 4; and Pliny, Hist. Nat. x, 41.) Harduin concludes, from Pliny’s account of it, that it was the magpie. But we are rather inclined to follow Schneider in referring it to the jay, or _corvus glandarius_. On the disease, see Galen (Hyg.; de Causis Sympt. i, 7); Aëtius (xvi, 10); Theophanes Nonnus (c. 213); Moschion (de Morb. Mulier. c. 27); Eros (apud Gynæcia), Alexander Aphrodisiensis (Problem. ii, 73); Pseudo-Dioscorides (Euporist. ii, 16); Soranus (viii); Leo (vi, 14); Rhases (Contin. xi); Avicenna (iii, 21, 2); Haly Abbas (Theor. vi, 17); Serapion (Tr. iii, 22); Alsaharavius (Pract. xxv, 2, 8.) It appears to be the malacia of Pliny (Hist. Nat. xxiii, 56, ed. Hard.) Moschion defines the Pica to be an appetite for unusual food, which happens to pregnant women at some irregular period; being attended with a collection of depraved humours and nausea. It occurs, he says, most commonly in the second month, but sometimes earlier, and sometimes later. He recommends a restricted diet at first, then wine, dry astringent food, cataplasms of a repellent nature, and bodily motion. Soranus treats of Pica in very similar terms to those of Moschion.