134 KANSAS UNIVERSITY SCIENCE BULLETIN. 



superficial examination, chitiuized crescents, but on closer ex- 

 amination are seen to be rather elliptical-shaped openings. 

 Directly cephalad of each marginal-gland orifice are found struc- 

 tures resembling small chitinized rods. These are, according 

 to Berlese (1896), the chitinized disks of the marginal-gland 

 orifices. These crescents alternate with the lobes until after 

 the third lobe, when there are two before the fourth lobe. 

 There are also found between the lobes thin, flat, transparent, 

 fimbricated processes called plates or squames. They are the 

 same length as the lobes and vary in number of incisions from 

 three to four in those plates mesad of the third lobe and number 

 as high as eight to twelve or even more in those later ad of the 

 third lobe. These plates are situated two in each of the spaces 

 between the lobes mesad of the second lobes, and three in the 

 spaces between the second and third and the third and fourth 

 lobes. 



Scattered over the pygidium and more numerous towards the 

 edges are found the spool-shaped dorsal glands. These seem at 

 first glance to have no definite arrangement, but on more care- 

 ful observation of a number of specimens certain of these 

 glands are found to be constant in position. These are the 

 median dorsal gland, found on the median line just cephalad of 

 the median marginal-gland orifice, and a pair of glands situated 

 one on each side of the pygidium on a line drawn from the anal 

 opening to the third lobe, and situated at about from one- to two- 

 thirds of the entire distance from the anal orifice. This pair of 

 glands was found in no other species studied. The arrange- 

 ment of the rest of the glands is less constant. The dorsal 

 glands near the margin and laterad of the median gland are 

 sometimes arranged in a row even with the median dorsal 

 gland, there being one dorsal gland approximately above each 

 marginal gland. ( See PI. XXIII, fig. 1.) Indifferent specimens 

 and even in the two sides of the same specimen the arrange- 

 ment of the glands laterad of the median gland may vary con- 

 siderably, some being found more cephalad and some more 

 caudad than the median dorsal gland. The number has been 

 found to be fairly constant. There is also sometimes a second 

 pair of glands found half-way between the pair above mentioned 

 and the second or third lobes. 



This species has been found on Zizyphus pinnachristi , date- 



