Sept, 1898.] TOWNSEND & COCKERELL : On MEXICAN COCCID^E. 169 



antennae of first larval stage of littoralis var. mimosa Ckll., differ from 

 typical littoralis in the more uniformly stout basal joints and stout last 

 joint, the intermediate joints being narrowed, giving the antennae a 

 constricted appearance in the middle. In typical littoralis the basal 

 joints seem nearly as narrowed as the intermediate ones. Both the 

 typical form and var. mimosa have the last antennal joint of first larval 

 stage with several (about 3) very long hairs. Both also have the lateral 

 bristles of border of abdomen anterior to anal bristles, in first larval 

 stage, well differentiated from other lateral hairs, thus falling in the 

 group with rosce, montserratensis and palmeri. 



The antennae of adult 9 were both broken, one showing nine joints, 

 the ninth joint being fractured and the distal portion missing. But the 

 identity of the newly hatched larva with that of littoralis proves the de- 

 termination beyond doubt. 



Ortonia primitiva, sp. nov. Towns. 



Differs from O. mexicanorui?i Ckll. as follows : Antennae only 9 jointed, less than 

 twice as long as femur plus trochanter, more than twice as long as femur alone, the 

 first five joints being about equal in length to the femur plus trochanter. Approxi- 

 mate antennal formula, (39) (21) (678) (45). Ninth is not as long as seventh and 

 •eighth together. The only joints that are broader than long are I, 2, 4 and 5. 

 Joints 3, 6, 7 and 8 are about as broad as long. In some cases 8 seems a little longer 

 than 6 and 7. The last three joints are approximately equal in width, while the 

 other joints gradually narrow proceeding toward the base. Joint 1 is perhaps |- wider 

 than 2. Tibia more than % longer than femur, and but little more than "^ as broad 

 as femur, being rather slim. Tarsus (not including claw) about ]/ z length of tibia 

 with about seven spines in a line on inner edge, tibia with about ten such spines. 

 Claw apparently with a short stout rudimentary digitule. Under and outer edge of 

 claw on each side delicately scalloped, showing four scallops. No bristles apparent 

 ■on claw. Integument showing the large round and oval hyaline spaces said to be 

 characteristic of the genus, and thickly covered everywhere with numerous long strong 

 spines interspersed with shorter ones. Boiling in KHO stains the liquid brown. 

 Length of O after boiling, about 5 or 6 mm. ; dried unboiled ones are 3 mm. long, 

 by 2 mm. wide. One of the larger specimens is accompanied by a considerable 

 amount of pure white, fluffy, cottony secretion, which may form a substitute for an 

 ovisac in this species. This cottony secretion, which does not seem to be present in 

 mexicanorum, together with the presence in the debris of small orange colored eggs, 

 indicates that the material is adult. 



This species and mexicanorum need the erection of a separate sub- 

 genus for their reception, perhaps two subgenera. I propose the name 

 Protortonia for the present species, and it may even be found to merit 

 generic rank, as being quite distinct from Ortonia. For the present, 

 O. mexicanorum can be included in it also. 



