30 PAPILIONID.E. 



Genus VIII. THAIS Fab. 

 Fab. Syst. Gloss, (ined.) 



Pieris Schrank. 



Zerynthia Ochs. Schmett. von Enropa, iv. 29. (1816). 



Head small, hairy. 



Eyes rather small, round. 



Maxilla of moderate length. 



Labial Palpi very hairy, distinctly triarticulate ; basal joint shortest, third joint about equal in 



length to the second, much slenderer. 

 Antennce short, with an elongate arched club. 

 Thorax rather slender. 



Anterior Wings triangular, the outer margin rounded. First subcostal nervule thrown off beyond 



the middle of the cell, second much nearer to the first than to the end of the cell, third 



considerably beyond the cell, fourth not far from the third. Upper disco-cellular nervule short, 



or entirely wanting. Baseo-median nervule wanting. 

 Posterior Wings somewhat ovate, the inner margin, especially in the males, deeply excised, outer 



margin dentate, or tailed. Precostal nervure not branched ; disco-cellular nervule almost 



wanting. 

 Legs rather short. Anterior Tibia? with a sharp spur beyond the middle; tibia? of the second and 



third pair with two sharp spurs at the end. Tarsi spiny, rather slender, long ; the basal and fifth 



joints longest ; second, third, and fourth progressively shorter. Claws very sharp ; the outer 



short, received into a groove of the inner. 

 Abdomen slender, furnished in the males with two large deeply toothed corneous plates. 



Larva cylindrical, short, with several longitudinal series of fleshy tubercles, tufted with short 



hairs at their apex. 

 Pupa subcylindric, slightly angular, the head truncate. 



This genus is closely allied to Doritis, and not very distantly to Teinopalpus, thus completing the circle of the 

 Papilionidas. The tailed posterior wings of H. Cerisyi, and the elongate palpi, bring it very near to the last-named 

 group. 



The Larvae live i m Avistolochia>, and differ from those of Doritis in being tuberculate. According to Dr. Rambur, when 

 about to undergo their metamorphosis, they not only fasten themselves by a transverse thread like the Parnassii, but 

 also surround themselves by a very slight silken web. 



The three species which compose the genus are inhabitants of Southern Europe, Northern Africa, and the Levant. 

 The numerous varieties of the two most widely dispersed species have caused each to be divided into numerous nominal 

 species. 



