THE COCCIDAE OF SOUTHWESTERN UNITED STATES 33 



Morphological characteristics. Adult female (flattened on slide) 2 

 to 2.25 mm. long; slightly pyriform, the anterior end pointed, the pos- 

 terior end broadly rounded. Cerarii apparently entirely lacking, the anal 

 lobe area bearing merely a few widely separated setae which are hardly 

 or not at all separable from the body setae. Dorsum almost bare except 

 for a few very small setae on the head and several rather large setae near 

 the lateral margins of the last two abdominal segments. Venter also 

 bare except for setae on the last two segments. Triangular pores and 

 tubular ducts few, the latter all small and without a raised rim about the 

 mouth. Venter with relatively few multilocular pores ; dorsum of the 

 abdomen with a few pores of this type. Anal ring on the dorsum at 

 some distance from the posterior end of the abdomen, rather small and 

 consisting of a simple, non-cellular ring. Anal ring setae scarcely as 

 long as the diameter of the ring and about one-fourth as long as the anal 

 lobe setae. Legs quite short. Antennae six-segmented. 



Notes: It is not impossible that this is R. sporoboli Ckll. However, I am 

 here describing a species that I place tentatively as sporoboli and if my determina- 

 tion of the latter be correct the two are distinct. 



Ripersia sporoboli Ckll. ? 



Type host and locality. From Sporobolus depauperatus, Arroyo 

 Pecos, Las Vegas, N. Mex. 



Material examined. From Sporobolus aeroides, Farmington, N. 

 Mex. 



Habit. On leaves and stems, enveloped in white secretion. 



Morphological characteristics. In general closely resembling the 

 preceding, but with the anal lobe cerarii present, containing two setiform 

 spines which are set close together. Anal ring simple, apparently. inter- 

 rupted anteriorly. Antennae seven-segmented. 



Notes : This is possibly not R. sporoboli. The determination is based en- 

 tirely upon hosts and the specimens at hand have seven-segmented antennae, while 

 according to the original description the antennae are six-segmented. 



The material at hand was collected by Mr. E. Bethel and transmitted to me 

 by Professor Cockerell. 



Genus CRYPTORIPERSIA Ckll. 

 1918. Ferris, Cal. Species Mealy Bugs, pp. 73-4. 



This genus differs materially from the genus Ripersia (as denned 

 above) only in having the anal ring distinctly cellular. The possession 

 of a complete sac is hardly to be regarded as a generic character, being 

 due merely to an increase in the number of tubular ducts. 



