THE COCCIDAE OF SOUTH AFRICA. 41 



three indistinct joints, always exhibiting pseudarticulations. In the longest 

 antenna seen, after staining, one could observe 6 ill-defined joints measuring 

 (1) 17, (2) 14, (3) 14, (4) 14, (5) 14,(6) 20//. 



Leg I : coxa 34 ; femur ± trochanter 85 ; tibia 85 ; tarsus 27 ; claw 17//. 



The margin has a scant series of short, curved, moderately stout spines, except 

 near the anal cleft, where the spines are closer set, long (41//), straight and very 

 acute. The anal cleft is invariably thrown to one side and is not in the median 

 line as in Lecanium. The anal ring has numerous (12?) hairs ; anal plates about 

 120/^long. Embryo-larva large, about 420/< long, with 6-jointed antennae. Caudal 

 extremity produced, with prominent caudal lobes, each with one long, stout seta 

 (136//) and several shorter spines. 



Habitat : On grass or thin reed. Label in tube reads : " From Dr. Peringuey, 

 S.A. Museum, Nov. 1908." 



Collection No, : 140. 



Genus Membranaria, nov. 

 Lecaniid, somewhat like Pulvinaria but with the cottony ovisac replaced by a 

 membranous receptacle. Antennae and legs well developed, the former 7 or 8- jointed. 

 Type, M. pretoriae, sp. n. 



246. Membranaria pretoriae, sp. n. (Plate iv, fig. 247). 



Adult $ with ovi-receptacle about 5*5 mm. long, 2 mm. broad and 3 mm. high. 

 Eeceptacle membranous, secreted from the margins, particularly the posterior 

 margin, of the insect, so that, when completed, the insect, except the head end, 

 is raised from the stem. The membrane consists of two coats, both thin, but 

 which may be readily separated. The outer coat is pale, honey-comb yellow, not 

 striated, and is produced from the upper margin of the insect. The inner coat is 

 paler in colour and has longitudinal striae. The completed receptacle is hoof- 

 shaped (fig. 247) with a distinct, dense, longitudinal, median keel. Its greatest 

 length, along this keel, is about 3 mm. 



The adult $ is deep caramel-brown, sometimes speckled with black, glossy, with 

 a rounded, median ridge and marginal corrugations and depressions. Cleared and 

 mounted the adult $ is moderately dense. Margin with a single row of simple, 

 hair-Uke spines set wide apart. Submarginal area, except of anterior end, with a 

 broad band of very numerous, small, gland pores, each with a curved, linear gland 

 tube. Stigmatic cleft obsolete, but indicated by a pair of curious, short, broad, 

 cup-likcj protuberances. Anal ring with 8 hairs ; anal plates surrounded in 

 front by a dense, rugose, chitinous plate. 



Antennae 7 or 8-jointed ; range in // : — 



I II III IV V VI VII VIII 



20-31 31-34 17-41 20-48 17-24 17-24 24-27 — 



24-27 27-37 24-34 14-24 20-27 17-20 16-20 2^27 



Leg I : coxa 102, femur + trochanter 238, tibia 153, tarsus 51, claw 20/<. 



Habitat : On crowns of grass, in front of Union Buildings, Pretoria ; collected 

 by the writer, October 1914. 



Collection No. : 83. 



