Plate 9. 



Fig. 103. Larva of Tahanus autumnalis (?). g, Graber's organ. After 

 Graber. 



Fig. 104. Posterior end of larva, magnified, comprising 9th, 10th, 11th, and 

 12th segments. (In the original the numbers are given erroneously as 8, 9, 10, 

 and 11.) tr, tracheal trunks; dv, dorsal vessel; g, Graber's organ;/, terminal 

 tube; m, two muscles extending forward from Graber's organ. After Graber. 



Fig. 105. Graber's organ in situ, dv, dorsal vessel; tr, lateral tracheal 

 trunks; fm, muscle of dorsal vessel; m, muscles; /, terminal tube; n, nerves (?); 

 /, fat body; cu, cuticle of integument; hp, hypoderm. X 60. Zeiss oil immer- 

 sion. After Graber. 



Fig. 106. The organ isolated, c 1 to c3, chitinous capsules; sp, extremit}^ of 

 capsule; ep, its epithelium; cp 1 to cp 4, pedunculate bodies, (in the original 

 only the first capsule bears this name, while the inner ones are treated as 

 "internal sacs"); ml to ml, muscles; n to « 1, nerves (?) ; ga, ganglion-like 

 swelling of first nerve; /, terminal tube; op, operculum. X 133. Zeiss oil 

 immersion. After Graber. 



Fig. 107. One pair of pedunculate bodies, cp, body; st, hollow stem or 

 peduncle; cu, scaly cuticle to which they are fastened. X m. Zeiss oil immer- 

 sion. After Graber. 



Fig. 108. A portion of elastic connective tissue from the surroundings of the 

 organ, after treatment with boiling KOH. X 333. Zeiss oil immersion. After 

 Graber. 



Graber's figures, Figs. 103 to 108, were drawn from fresh material. 



