PERFECT INSECTS WITH THE LARVAL HEAD. J 3 



The female showed perfectly well the head of the caterpillar, and 

 beneath it the skin of the chrysalis, containing the head of the imago. 



"Itaque ibi senectfe caput [head of the caterpillar], nymphaj ver- 

 tex et necydali [imaginis] conjuncta conspiciebantur ; quae conjunctio 

 retinebat senectam [skin of the caterpillar] in ventre, ne potuerit 

 potius avelli et destringi. Ideo et cohajrebat, cum alvi acumine, non 

 aliter ac si quis sacco fuit inclusus ; et circa caput astrictus ; facto vero 

 in tergo foramine dorsum extaixisset quidem, sed adhuc hrereret capite 

 et podice, ita jacens incurvus et exanimis. Sic habebat senecta (the 

 caterpillar]. Ex hac prominebat et aurelia [chrysalis], quod attinet 

 partem superiorem. Ex aurelia vicissim necydalus [imago] fere totus 

 eluctatus erat, fracto putamine in dorso, solitaque regione ; sed capita 

 cohajrebant indivulsa, sicut et alvi extrema. In ventro exorto magna 

 copia ovorum conspiciebatur colore llavo." 



The statement of the skin of the caterpillar split on the dorsum dis- 

 agrees with the statement by Mr. Bruinsma. 



Professor Van der Hoeven (ibid., p. 274) communicates, in a letter to 

 Mr. A. Brants. November 26, 1839, that Mr. Einodhven, in his silk-worm 

 nursery at Brummen, Holland, had observed several times imagines 

 with the head of the caterpillar. Mr. Brants was able to take out of 

 one of them the perfectly developed head of the imago. The antenna3 

 were coiled up, covering the eyes of the insect. 



Mr. Bond exhibited in the Entomological Society in London, Febru- 

 ary 20, 1871, a specimen of B. Mori retaining the larval head. The 

 specimen was somewhat crippled and very small, as I am informed by 

 Mr. M'Lachlan. 



Gastropacha quercifolia. 



A specimen with the larval head is recorded by Professor Westwood 

 in Entomol. Month. Magaz., No. 82, p. 239. 



Zerene adusta. 



I am indebted to Professor Zeller for the details of this. Among a 

 number of caterpillars of this species, one transformed in a chrysalis, 

 with the head of the caterpillar. The chrysalis died, perhaps because 

 it was kept too dry. Otherwise probably a moth would have been 

 reared, as the chrysalis was perfectly developed. The head of the cat- 

 erpillar was in perfect condition, but placed so far beneath that the 

 chrysalis had a hunchbacked appearance. The face and the ventral 

 side met in an acute angle ; a collum was wanting, but the head was 

 round, separated more deeply below. As all parts of the head of the 

 chrysalis are covered by the head of the caterpillar, there are no an- 



