PROC. ENT. SOC. WASH., VOL. 21, NO. 4, APR., 1919 M 



landulosum at Buenos Aires, Argentina, May, 1911, under collec- 

 tion number \'l. 



The type's are in the U. S. National Collection of Coccidae. 



Genus Ceroplastodes Ckll. 

 Ceroplastodes misiones, n. sp. 

 (PI. 4, fig. 7; pi. 6, fig. 3, A-G.) 



Test of Female. Occurring on the small stems of the host; length about 

 i 1 . 75 mm., width 1.5 mm. height 1 mm., elongate oval, strongly convex, ends 

 rounded, with low broad median carina which runs from the anal opening 

 to the anterior border, except for a short distance at either end, and is divided 

 into three sections, frequently with part missing or reduced; rest of dorsum 

 smooth, laterally with a row of small blunt tubercles above, with a row of 

 impressions or shallow pits below, these followed lower down by another row 

 of low tubercles, this arrangement poorly defined and often not determinable ; 

 the test somewhat glassy, translucent whitish showing faint straight lines 

 radiating from the lateral pits and wavy lines, somewhat similar to those 

 on a mussel-shell, encircling the group of lateral pits; the anal plate orifice 

 irregularly elongate oval. 



Adult Female. Color of dried form varying from light chestnut to dark 

 reddish brown; body shriveling to the anterior end of the test, and wholly 

 free from it, the fully expanded female mounted on a slide as much as 2.5 

 mm. long and 1.5-2 mm. broad, broad oval, the anal cleft short, so the anal 

 plates are not inserted more than twice their own length within the posterior 

 body margin; giving off a yellow-brown stain when boiled in KOH, the derm 

 becoming nearly colorless; antennae quite variable, 7 to 8-segmented, the 

 difference due to a division of the fourth segment, and indicated in the follow- 

 ing table of measurements in microns by placing the measurements of the fourth 

 segment in the 7-segmented antennae under the combined heading IV and V : 



legs large, rather stout, average measurements of a middle leg as follows: 

 coxa, 153. 5/x, trochanter 100 yu, femur 178.5/u, tibia 160. 6,u, tarsus 114. 2/u, 

 flaw 25/u, tarsal digitule 57^, claw digitule 28.5/u, tarsal digitules long and 

 slender, slightly knobbed at apex, claw digitules both stout, slightly swollen 

 basally and apically; body margin with a continuous row of rather stout 

 tapering spines, very bluntly rounded, almost truncate at apex, averaging 

 about 18-22(u long and most spaced a little further apart than the length 

 of one spine; accompanied by an occasional submarginal slender sharp 



