74 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
between the cephalic sete of the anal ring. The caudal pair 
of sete are separated from the cephalic pair by a space equal 
to one-half the distance between the caudal pair of sete. The 
sete of the caudal pair are slightly farther apart than are the 
sete of the cephalic pair. Lines drawn longitudinally through 
the corresponding right and left sete of each pair would form 
a much elongated inverted ‘‘V’’. 
These sete are believed to be good specific characters. How- 
ever, their usefulness as specific characters will probably be 
very limited because of the difficulty of making mounts which 
will show them in their proper relations. 
CERARI—(Figs. 6-17) 
The term cerari is synonymous with filuri (Berlese). A 
cerari is composed of one or more conical sete surrounded by 
a group of wax pores. <A conical seta, figs. 6-7, is easily dis- 
tinguished from the ordinary sete covering the body. They 
are broader across the base and distinctly cone-shaped. Dif- 
ferent proportioned conical sete are found in different species, 
the relation of the width of the base to the length being a 
specific variation. The wax pores of the cerari are of the 
usual triangular type covering the body. The cerari occur 
slightly dorsad of the margin of the body. There are seventeen 
pairs in each of the species studied. The number of cerari for 
each body segment was studied, but no definite conclusions 
reached. Berlese in his study of longispinus Targ. assigns five 
cerari to the head, one to the prothorax, two to the mesothorax, 
two to the metathorax and one each for the seven abdominal seg- 
ments. To solve definitely this problem the segmentation will 
have to be followed from the first nymphal stage. 
The number of conical sete and the grouping and number of 
the wax pores is a fairly constant specific character. There is a 
marked specific variation which, however, is well within the 
limits of the generic variation. 
So far as known to the writer, the cerari have never been used 
in taxonomy or mentioned in descriptions of species of the sub- 
family Eriococcine. The following is a description of the cerari 
