JOURNAL OF ENTOMOLOGY AND ZOOLOGY 77 



of each of the five species studied. The cerari are numbered from 

 the liead caudad. The measurements given do not include the 

 base of the conical setae. The diameter being taken just above 

 the collar-like base and the length being taken from the base to 

 the apex of the setae. 



Citri Eisso— (Figs. 10-11, Table I). An examination of Table 

 I shows that the number of conical setae is two for each cerari 

 and that this number is constant in all the specimens tabulated. 

 Fig. 10 shows a camera lucida drawing of the first cerari. It 

 will be seen from this figure that the number of wax pores 

 is very few compared to the head cerari of some of the other 

 species. This small number of wax pores is a constant specific 

 character. In a large number of species examined the arrange- 

 ment of the wax pores and setae varies but slightly from the 

 figure. Cerari 2-16 resemble very closely this figure. The 

 conical sette of the first cerari are 17-19 microns long and 4.2-4.8 

 microns in diameter. Fig. II shows the anal cerari. The bases 

 of the conical setae are one-third larger than those of the head 

 cerari. There are but few pores as in the first cerari. The 

 two conical seta^ of each cerari are subequal in size. Two 

 smaller setae are seen near the cerari. The conical setae of the 

 anal lobes are 21-24 microns long and 5-6 microns in diameter. 



Ohscurns Essig — (Figs. 14-15, Table II). Fig. 14 shows the 

 first cerari of this species. The conical setae are slightly larger 

 than those of the preceding species. The wax pores are ar- 

 ranged thickly. There are three conical setae in this cerari, a 

 constant character. The number of conical setae in the second 

 cerari varies from two to four ; four is the usual number. The 

 fourth and fifth cerari each have two conical setae. The sixth 

 cerari has three conical setae. The cerari caudad of the sixth 

 each have two conical setae. The conical seta? of the first cerari 

 are 9-10 microns long and 3.5-4.2 microns broad. 



Fig. 15 shows the cerari of the anal lobes. The large number 

 of wax pores is noticeable. The caudal conical setae of the cerari 

 is noticably larger than the cephalic one. The length of the 

 conical setae varies from 28-32 microns and the diameter 8-10 

 microns. 



