64 DESCRIPTIVE CATALOGUE. 



VERMIFORM STIRPS. 



Typical Character. 



Larva, as to form, either ovate, oblong, cylindrical, or linear ; as to surface, convex, 

 gibbous, or depressed : always marked with prominent transverse striae or divided 

 into scutiform segments : most generally naked, in some cases villous, rarely 

 provided with lateral appendages : underneath smooth : having a small head and 

 minute feet, partially concealed by the abdominal segments. 



Pupa, smooth, obtuse at both ends, attached by the caudal extremity by means of a 

 slight filamentous texture, secured in an erect attitude by a brace, the head being 

 directed upwards. 



Larva forma ovata, vel oblonga, vel cylindrica, vel linearis ; superficie convexa, gibba, 

 vel depressa : semper tranverse striata, segmentis scutiformibus : nuda, vel nonnun- 

 quam pilosa, rarius appendiculis lateralibus instructa : subtus glabra : capite minuto, 

 pedibusque vix apparentibus. (Tota quoad habitum Onisco, Porcellioni, vel Epi- 

 zoariis similis.) 



Papa nuda, utrinque obtusa, postice alligata, capite sursum spectante, Jilis collo et 

 abdomine circumligatis erectefere suspensa. 



Observation. — The peculiarities of the perfect insect of this stirps have already been detailed in 

 pages 38, 39, and 40 of the Introduction ; they are likewise exhibited on the Synoptic Table. 

 I shall, therefore, not recapitulate them in this place. The regular order of the plan of Mr. 

 Macleay would require that I should proceed to the division of the Stirpes into Families ; but this 

 would require a more extensive examination of materials, and more numerous references and 

 comparisons, than I am enabled to undertake at present. I shall, therefore, defer the attempt to 

 a more favourable period. For my immediate purpose it is sufficient to state, that the. genera 

 Petavia, Polyommatus, Lycarna, Thecla, and Myrina, are individually representatives of Fami- 

 lies, for the precise subdivisions of which a general acquaintance with all the species hitherto 

 collected, and to be found in cabinets of Entomology, would scarcely be sufficient. 



Genus 



