54 



CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Dactylopius cotnstocki. 



Dactylopius theobrotncs. 



Segment 8 of antenna equal to 5, 

 6, and 7 together. 



Tarsi half the length of tibiae; claw 

 short. 



Segment 8 of antenna very much 

 shorter than 5, 6, and 7 together. 



Tarsi one-third length of tibiae; 

 claw rather long and large. 



Type in the Entomological Collection of Leland Stan- 

 ford Jr. University, and co-types in the author's collection. 



13. Dactylopius pini, sp. no v. 



Plate IX, Figs. 36-38. 



Adjilf Female.— Found among growing needles of pine. A white cottony 

 secretion covers all the body. Color, reddish brown; legs and antennae 

 brown. When boiled in KOH the color turns purple. Length about 4 mm., 

 width about half the length. Margin of body with fine simple hairs; dor- 

 sum with fine hairs and minute round pits. Antennae eight-segmented, .4 to 

 .5 mm. long, hairy; segment 8 always longest; 4 usually shortest; segments 

 2 and 3 subequal. The following formulae show the variations in the relative 

 lengths of the antennal segments: — 



8, 2, 3, I (6, 7) 5, 4. 

 8, 2, 3, I, 7, 6, 5, 4. 

 8, 2, 3 (I, 7) (5, 6) 4. 

 8, 2, 3 (I, 7) (4, 5. 6). 

 The measurements of the antennal segments vary as follows:— 



Mouth-parts as usual; rostral loop long. Legs round; coxa short, wider than 

 long; trochanter triangular, with one long and two or more short hairs; femur 

 large, outer margin convex; tibia not so stout as femur, but almost equal to 

 it in length; tarsus less than half the length of tibia; segments with many 



