NOTES ON A TERMITOPHILOUS TINEIl) LARV A. 5 



of the appendage.) The blood-tissue is verv finely granulated. 

 eosinophilous and contains numerous leucocytes. 



The appendages are provided \\dth nervs and tracheae and 

 seem to be capable of movement through muscles, which extend 

 from the dorsal side of their basis to the ventral cuticle. Their 

 cuticle is in the proximal dorsal part and in the end verv thin. 

 but so far as I have been able to discover imperforate. 



The appendages appear to be the homologues of the glandu- 

 lar processes of the larva of the Bombycine moth Megalopyge 

 (Lagoa) crispa, described by Packard^ as well as of the so- 

 called osmet eria of the larvse of the Hemileucidce and other 

 lepidoptera,- some of which are known to give ont a disagree- 

 able odör. The abdominal processes of Megalopyge bear the 

 greatest resemblance to the above described, being permanen tly 

 everted and present in the same number and situation. Still 

 there exists a great difference between them so far as that the 

 hypodermis by Megalopyge is modified into glandular cells 

 (op. cit. Pl. VII), while by the Tineid larva the hypodermis 

 is of the ordinary shape. 



Packard never noticed that the processes of Megalopyge 

 gave off any odör; they are not visible in the full grown larva 

 being concealed by the long, dense hairs clothing the body. 

 He supposes them to be »permanently everted glands or os- 

 meteria, which have by disuse löst their power of retraction 

 and their crateriform opening as well as the power of secreting 

 a malodorous fluid». 



If af t er this attempt to trace the homologues of the appen- 

 dages amongst other larvse of lepidoptera, we compare them 

 with what is known about other termitophilous insects, we 

 notice at once that they present a striking resemblance to some 

 features of the larvse of Ortliogonius and Glyptus and of Xeno- 

 gaster. which have been investigated by Wasmann.^ 



Tliese insects according to W. do not possess any exteriör 

 specialised exudatory organs, such as ior inBtsince the Paussidce. 

 their blood-tissue sensus tricto acting as a substitute. Andas 

 -the blood-tissue is derived from the fat-body, the latter may 



^ A studv of the transformation and anatomv of Lagva crispa. Proc 

 Am. Phil. Soc' vol 32. 1893. p. 275. 



^ Packard, A. S. Textbook of Entomology. p. 375 — 383. 



" Zur näheren Kenntnis des echten Gastverhältnisses bei der Ameisen- 

 und Ta?rmitengä.stern. Biolog. Centralblatt Bd. XXTII Xo 7- p. 270. Xo 8. 

 p. 298—304. 



