ORGANS OF SPECIAL SENSE. 117 



kindness of Mr. V. Novitzki, who sent me a number 

 of drones, the heads of two of which are accurately 

 drawn in Fig. 23. A is a true albino, the eyes, com- 

 pound and simple, being alike absolutely devoid of 

 pigment. These drones evidently saw nothing clearly, 

 although they could distinguish light ; for, if placed 

 in a box with a small opening, they found the latter 

 at once, and crawled out, but remained captives if 



Fig. 23.— Heads of Abnormal Drones (Magnified Eight times). 



A, Head of Albino— oe, White Com 01 nil Eye 0, White Ocelli ; th, Tactile 

 Hairs; a, a, Antennae; m, Manlibala; rnx, Maxillae. B, Head of Eyeless 

 Drone — h, Hairs ; 0, Outline, showing Size of Head of Normal Drone ; 

 a, a, Antennae ; m, Mandibula ; mx, Maxilke. 



the box was kept in the dark. In the same hive 

 with these drones appeared others with a still more 

 extraordinary defect — no eves at all existing. The 

 owner represented to Mr. Novitzki that they were 

 headless, and such they might easily have been 

 supposed by a superficial observer. Smooth and 

 hard surfaces, bearing limp, irregular hairs, covered 

 the sides of the head, which did not rise high enough 



