40 PARTIAL ORISMOLOGY. 



Rajella*J, and in the rat=tailed maggot (the larva of Eristalis tenax), 

 which has no thoracic legs, but only prolegs upon the segments of its 

 body. The following table presents an arrangement of larvae, grouped 

 according to the position of their prolegs. 



1. Prolegs upon all the segments of the abdomen except the first 

 (eight pairs). 



The genus Cimbex, PL II. fj. 



2. Prolegs upon all the ventral segments, excepting the first and 

 penultimate (seven pairs). 



The genus Tenthredo. 



3. Prolegs are wanting upon the first, antepenultimate, and penul- 

 timate segments (six pairs). 



The genus Hylotoma, PL II. f. 5. 



4. Prolegs upon the anal and four ventral segments, viz. the sixth, 

 seventh, eighth, and ninth, PL II. f.9. 



The majority of caterpillars, namely all the hawk moths (Sphing- 

 odea), butterflies (Papilionacea), bombyces (Bombycodea), as well 

 as the majority of owlets (Noctuacea). 



5. Prolegs upon the anal, and three ventral segments, viz. 



a. The sixth, seventh, and eighth. 

 The caterpillars of many owlets. 



b. Upon the seventh, eighth, and ninth. 



Many caterpillars of the Pyralodea, Hypenarostralis. 



6. Prolegs upon the anal and two ventral segments (Larvae 

 geometrifurm.es), PL II. f. 10. 



The genera Plusia, Ophuisa, Acontia, Metrocampus, Lat. ; 

 Ellopia, Tr. 



7- Prolegs upon the anal, and one ventral segment (the last but 

 three), Larva geometrce, PL II. f. 11. 



The majority of the Phalcenodea. 



8. Prolegs upon the anal segment only. 



Some moths (Tineodea}, the genus Lyda, and many coleopterous 

 larvae. 



9. No prolegs upon the anal segment, but upon four of the ventral 

 segments (the seventh to the ninth), PL II. f. 12f. 



The larvaa of many moths (for ex. Harpy a, Platypteryx). 



Naturfoi-sch. St. IV. p. 37, &r. 



\- This is a similar arrangement to that of Reaumur, in his second Memoir in the first 

 volume, nol v somewhat modified and enlarged. TR. 



