428 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



Appendix 



Since the above paper was sent in, Mr. E. Bethel has sent me pieces 

 oiBetula glandulosa collected at Tolland on Aug. 26, plentifully infested 

 with Pulvinaria smd Eriococcus. Tolland is at an altitude of 8890 ft., 

 which is very high for coccids; and while it is not in Boulder County, 

 it is only a few miles south of the line. 



The Eriococcus is unfortunately represented only by males, but the 

 species is probably E. horealis CklL, the only one known to occur at 

 high altitudes. The Pulvinaria is represented by adults of both sexes, 

 and is a very puzzling form of the P. vitis group. Provisionally I 

 regard it as a variety of P. occidentalis Ckll. 



Pulvinaria occidentalis var. stibalpina n. var. 



9 Resembling P. innumerabilis, with the same sort of ovisac; scale very dark 

 brown, hard to clear, 6.5 mm. long, 5.5 broad; marginal bristles 22-30 p- long, 

 much more distant from one another than the length of one. Anterior tibia 180 P; 

 its tarsus (without claw) 85; claw stout, strongly curved; tarsal digitules quite stout, 

 55 ,'J- long; claw digitules with large knobs, about 7 P- diameter. Antennae 8-jointed, 

 joints measuring in P (1)67; (2) 67; (3) 100-102; (4) 67-75; (5) 67; (6) 35-40; (7) 

 30-32; (8) 57. Hair on first joint not very long; second with two bristles, one very 

 long, fully 112 p; third with one bristle, not very long; fifth with a very long bristle, 

 105 p; sixth and seventh each with a short bristle; eighth with many, none very long. 

 The immature female scales have a certain amount of thin glassy secretion on the 

 dorsal surface. 



cT Head and mesothorax black (brown by transmitted hght); neck reddish; 

 prothorax dark red; abdomen dark reddish; legs and antennae brown. Length about 

 1700 p, excluding caudal filaments, which are about 1100 p, and stylus, which is 405 p; 

 head small, 270 p wide; wings 1530 p long and 760 wide; anterior tibia 440 p, its 

 tarsus 200. 



The glassy white male puparium, 2 mm. long, is as in P. ribesice, except that the 

 posterior transverse lines or bands are continuous across the dorsum. 



This male, compared with that of P. ribesice, as beautifully figured 

 by Newstead, is seen to have the same coloration, but the caudal fila- 

 ments are much shorter, and the anterior tibiae are longer. In sub- 

 alpina the fourth antennal joint (220 /x.)'is much longer than the fifth 

 (150 /x), while in ribesice they are not far from equal. For the male of 

 P. vitis, we have Signoret's figures. According to these P. vitis has 

 the caudal filaments very long, as in ribesice, the fourth antennal joint 

 also about as in ribesice, but the anterior tibia long as in subalpina. 



P. innumerabilis male, as figured by Howard, has the caudal fila- 

 ments relatively short, as in subalpina, but the fourth and fifth anten- 

 nal joints are about equal and the tibiae are rather short. 



The female of subalpina seems to be distinguished by the relatively 

 short tarsus and certain features of the antennae. The hairs on the 

 antennae are practically as in P. vitis (as figured by Newstead) , except 



