A NEW MEALY-BUG FROM SOUTH AMERICA. 113 



it appears, however, omnivorous upon Hymenoptera, Diptera, 

 Lepidoptera and Coleoptera. He synonymizes the female {nee 

 male) of Walker's Macronetira maculipes (Ent. Mag. 1837, p. 354) 

 with this parasite, while Gaulle (Cat. Hym. France, p. 97) gives 

 Walker's species as the same as Eupelmiis degeeri, Dalm., said 

 by him — possibly in consequence — to also prey upon this hemip- 

 teron.f 



100. Aleurodes corni, Hald.* 

 The economy of his Proctotrypid Amitus aleurodinis, which 

 occurs in Pennsylvania, British Columbia, and Illinois, is set 

 forth by Haldeman (Amer. Journ. Sc. & Arts, ix. (1850), p. 108), 

 and elaborated by Forbes in 1884, Cresson in 1887, and Asbmead 

 (Bull. U. S. Nat. Mus., p. 293) in 1893. 



A NEW MEALY-BUG (COCCID.E) FROM SOUTH 



AMERICA. 



By T. D. a. Cockerell. 



Pseudococcus viissionum, n. sp. 



About 2 mm, long, of ordinary form, apparently with little mealy 

 secretion ; legs stout, lively ferruginous ; antennae 7- or 8-jointed ; 

 anal ring ordinary, with six short hairs. Females studied full of eggs, 

 which are 275 /x long and 170 broad. 



The species is especially distinguished by its small robust red 

 legs, and small pale antennae. The following measurements are in 

 microns : — 



Hind leg : length of trochanter, 105 ; of femur, 222 ; width of 

 femur, 92 ; length of tibia, 182 ; of tarsus, 95 ; bristles on hind tibia, 

 15 ; apical bristle of trochanter about 62. 



Antennge: 7-jointed, joints (1) 37-50, (2) 47-55, (3) 40-52, 



(4) 37-55, (5) 30-45, (6) 37-42, (7) 75-85. 



Antenna : 8-jointed, joints (1) 50-55, (2) 52-55, (3) 50, (4) 22-30, 



(5) 32-42, (6) 30-35, (7) 32-42, (8) 87-90. The seven and eight joints 

 do not indicate two species ; in one case a specimen was 7-jointed 

 on one side and 8 on the other. 



The 7-jointed antennae are close to those of Ripersia minima, 

 Tinsl. & King ; the 8-jointed are of an ordinary type, almost 

 exactly duplicated in certain specimens of Pseudococcus kingii, 

 Ckll., and P. texensis, Tinsley. 



Hah. — Santa Ana Misiones, Argentine, No. 13 {Lahilie). 

 The original lot has been divided between the collections of the 

 U.S. Department of Agriculture and the describer. 



f The larvae of this species is said by Eeaumiir (ii. Mem. vii., plate 25) 

 to be devoured by a minute coleopterous larva, which Westwood (Introd. ii. 

 443) suggests is probably that of some species of the Coccinellid genus 

 Scymmts. 



