94 



PSYCHE. 



[July .897. 



frons. It is characterized by having 

 the front reddish-yellow with vertex 

 brown, the legs brown, abdomen with 

 no yellowish or reddish except at tip, 

 three thoracic lines, and the black 

 median pair of abdominal stripes 

 pronounced. 



The present specimen has the median 

 thoracic line more pronounced than in 

 the variety abdominale., but still nar- 

 rower than the outer ones. The pollen 

 of fourth, fifth, and sixth segments as- 

 sumes a strong golden hue, especially 

 when viewed obliquely from in front. 

 Fifth and sixth segments and base of 

 seventh reddish-yellow under the 

 pollen. The median abdominal stripes 

 are deep black ; thej- form two widened 

 subsquare markings on second segment. 



TWO FORMS OF FLUTED SC.\LE. 



Up to the present the famous Fluted Scale 

 {Icerya piirchast "Sl^iiieW) of California has 

 been regarded as a single species, without 

 any important variations. I was therefoi-e 

 surprised to learn from Mr. Alex. Craw that 

 over six years ago he had noticed that 

 there were two distinct forms, and that his 

 subsequent experience had shown liim that 

 they remained distinct, and did not depend 

 on location or food-plant. Mr. Craw has 

 been so good as to send me living adult 

 females of the two varieties, and they can be 

 readily distinguished as follows: — 



(i.) var. maskelli. Female (after forming 

 ovisac) slate grey or very dark purplish-giey, 

 sometimes brownish in the middle, with 

 marginal dull orange spots. Back little 

 covered by secretion. More hairy at the 

 cephalic end than the next- Ovisac not so 

 large as in the next; tinged with yellow just 

 behind the body of the insect. Mr. Craw 

 says this is the form they had in Los Angeles. 

 It \% purchasi'm the strict sense, and agrees 



two broad lines on third, and two nar- 

 row lines on fourth. They are widened 

 at hind margin on second and third seg- 

 ments. Very few dots present in the 

 pollen of abdomen. These in the main 

 are the characters of the typical form. 



All the other specimens that I have 

 taken in New Mexico (Mesilla Valley, 

 Organ Mts., Tularosa Plains) are var. 

 abdominale (3Soo-55ooft.). The pres- 

 ent is the only one of the typical form 

 taken, and it comes from about 7000 ft. 

 elevation. (See paper on Dipt. Organ 

 Mts. for notes on var. abdominale.) 



X. B. — By mistake the species given 

 in section I of this paper were not 

 numbered. They include numbers i 

 to 6. Those in this section are num- 

 bered from 7 on. 



very nearly, though not entirely, with 

 Maskell's description. 



(2.) var. cyawii. Female (after forming 

 ovisac) light pinkish or yellowish-red, the 

 margin orange, with bunches of short black 

 bristles. The back is largely covered with 

 yellowish-white secretion. Ovisac some- 

 what larger and longer. Legs somewhat 

 smaller, femora decidedly more slender. 

 This may prove to be a distinct species, but 

 the larval and adult characters, except those 

 mentioned, agree so well with purchasi that 

 it seems best to give it only varietal rank. 



Both forms were sent on Citrus; the 

 precise locality not stated. Mr. Craw says.: 

 "When I sent two large boxes of infested 

 branches from Lodi to San Gabriel to stock 

 the two large glass breeding houses for 



Vedalia caydinalis that the State Board 

 erected there, I saw that the light colored 



scale \_i. e. var. cratvit] retained its characters 



there on the orange trees." 



T. D. A. Cockerel!, 



Mesilla, N. M., May ^0, iSgy. 



