414 N. E. MCINDOO. 



wing near the anterior margin of the wing a short distance from 

 the place where the wing folds (Text-fig. iC, a). On the right 

 wing it consists of three pores and on the left wing of five pores. 



Groups Nos. 5 and 6 are located at the proximal end of the 

 trochanter (Text-fig. 2A-F, Tro), No. 5 lying on the outer 

 surface and No. 6 on the inner surface. No. 5 usually extends 

 only about half way across the leg, while No. 6 extends nearly all 

 the distance across the leg. No. 5 on each leg consists of five 

 pores, except on the left front leg where there are seven in it. On 

 the right side No. 6 on each leg consists of seven pores, whereas 

 on the left side on each of the middle and hind legs it consists of 

 eight pores but of only six on the front leg. 



Groups b and c of the scattered pores lie at the proximal end of 

 the tibia (Text-fig. 2A-F, Tb), group b being located on the outer 

 surface and group c on the inner surface. Group b on each front 

 leg consists of only one pore; on the right middle leg it has one 

 pore, but on the left middle leg it has two pores; on the right 

 hind leg it has three pores while on the left hind leg it consists of 

 two pores. Group c on each front leg has three pores, whereas 

 on each of the middle and hind legs it has only one pore. 



All six legs of the specimen of Epilachna borealis examined 

 bear 95 olfactory pores; both elytra carry 149 pores, and both 

 wings carry 288 pores. All of these combined make 532 olfactory 

 pores. 



{b) Other Species. 



The greatest variation found in the olfactory pores of the 

 other species examined is in regard to the total numbers of the 

 pores. The second greatest variation is in regard to the distribu- 

 tion of the pores on the wings. This variation and other minor 

 ones will now be given and a discussion of the total numbers of 

 the pores will be presented last. For sake of brevity, instead of 

 using the long scientific names of the beetles, the species will be 

 numbered from i to 50, and those interested in associating the 

 names of the species with the variations described may do so by 

 referring to the names and numbers of the species in the table on 

 page 419. 



A group of pores (No. i) was found on the peduncle of each 

 elytron. This group in 46 species is definite, that is, the pores 



1 



