34 ENTOMOLOGICAL SOCIETY 



broad at base, with no denticle on inner side. Hind femora plus tro- 

 chanter 170-175, width of femur 47. Antennae broken in the material 

 examined, but joint I is 45 on long side, 25 on short; joint 2 is 30; 

 the last joint is 62, and very bristly. 



Larva. Antennae and legs very stout; antennal joints (i) 22, on the 

 longest side, (2) 15, (3) 12, with width 17, (4) 12, (5) 12, (6) 50. 

 Hind leg: femur plus trochanter 82, tibia 45, tarsus 50. 



Posadas, Argentine Republic, on Baccharis genistelloides, 

 August 26, 1905 (Schrottky). 



The ovisacs occur singly or a few together, but not bunched 

 in masses. Eriitm armatum (Hempel) is also from Baccharis, 

 and specimens from the type lot show that it has the same 

 mammseform caudal lobes, the same spearhead-like spines, and 

 the measurements of the legs and antennae are not essentially 

 different. I found the second antennal joint to measure 25, 

 the last 62 ; the anterior leg with femur plus trochanter 142, 

 tibia 65, tarsus 50. Hence, in spite of some differences indi 

 cated by Hempel's description, I do not like to call the Argen 

 tine insect a different species. I remove the species to Pseudo- 

 coccus, not because it is at all typical of that genus, but because 

 it is related as closely as possible to P. filamentosus (Ckll.) 

 and P. hymenoclece (Ckll.). Perhaps all three should be 

 placed in Erium, or else this generic name should be aban 

 doned. The resemblance to filamentosus is remarkably close 

 so close that if the insect had not been described by Hempel, I 

 should have hesitated to propose a new specific name for it. 

 The occurrence of the filamentosus type in the Argentine Re 

 public is of much interest, and adds one more to the known 

 cases of species of the southern part of North America being 

 represented by those allied in southern South America. 



Phenacoccus helianthi (Ckll.) 



Glenwood Springs, Colorado, on a composite, apparently 

 Machaeranthera. New to Colorado. 



The original description is not as detailed as could be wished, 

 so I give a new one from the Colorado material, which was 

 collected by Mr. E. Bethel. 



$. Very pale yellowish-grey; making a long white cottony ovisac, 

 about 6 l /2 mm. long and 2 broad. Boiled, it turns red, but does not 

 stain the liquid. Skin with many round glands, about 5 /* diameter ; 

 labium about 152 /* long and 112 broad, regularly tapering from base 

 to apex; hairs of anal ring six, about 145 M long. Legs light yellowish, 

 bristly; tibia with six bristles on outer row. 



Measurements in /*: Anterior leg; femur plus trochanter, 300 (width 



