BY the death, at the age of seventy-eight, at Rennes of the veteran naturalist, Charles Oberthur, workers in the study of insect life have suffered the loss of one whom personal tastes, the circumstances of life, and a persevering and enthusiastic character combined to make a conspicuous and leading figure among the fraternity of entomologists. As the printer and producer of his own works, Oberthur was able to give full scope to his conception of the requirements of entomological description and illustration. Similar ideals have presented themselves to others, but to few indeed has the opportunity been given to carry them out on so extensive and magnificent a scale. The splendid series of “Etudes d'Entomologie “and of “Lepidopterologie Comparee” which emanated from his press at Rennes bear witness to his indefatigable labours in the advancement of his favourite pursuit, and to the liberal, one might even say the lavish, expenditure which he devoted to the worthy presentation of the results of his entomological studies. The beauty and accuracy of the hand-painted illustrations in these volumes have never been surpassed.