14 
Regeneration in Ticks 
Fio\ 4. Argos pevsicus nymphs. Illustrating effects of mutilations inflicted in preceding stages: 
(A) Avgas 22, right palp in ventral aspect. First-stage nymph operated upon as a larva. 
Article 1 partly regenerated. 
(B) Avgas 5, ditto. The left palp closely resembled the one figured at (A). Partial regenera¬ 
tion of article 1. 
(C) Avgas 10, ditto. The left palp presented a similar appearance in this specimen. Regenera¬ 
tion of article 1 and a stump of article 2. 
(D) Avgas 9, ditto. The left palp was similarly formed. Articles 1 and 2 regenerated. 
(E) Avgas 12. Left palp in ventral aspect. First-stage nymph that had been operated upon 
as a larva. Articles 1 and 2 regenerated but malformed; article 3, partly regenerated, 
forms the stump. 
(F) Hypostome of novmal lst-stage nymph. 
(G) Deformed hypostome of Avgas 7, a lst-stage nymph that had been operated upon as a 
larva. 
(H) Much deformed hypostome of Avgas 67, a 3rd-stage nymph that had been operated upon 
as a 2nd-stage nymph. The structure forms a toothless spine. 
(I) Digit of novmal lst-stage nymph in dorsal aspect, 
(j_K_L) Deformed digits of lst-stage nymphs, in dorsal aspect, as they appeared in Avgas 
10, 9, 22 that had been operated upon as larvae. 
(M) Digitless end of right chelicera in Avgas 14, a lst-stage nymph that had been operated 
upon as a larva. 
