A SYNOPSIS OF THE APE I DI DAE 49 



Wilson wrote the author some time ago that he had taken this 

 species in California, although he gave no definite locality or collec- 

 tion record. The author has had the opportunity to study cotype 

 specimens. 



52. Lachnus sabinianus n.sp. 



Eecord. Pinus sabinian-a, San Francisco (Compere). 



In March, 1915, Harold Compere of the California State Insectary 

 found a small infestation of a species of Lachnus on Digger Pine in 

 the Golden Gate Park, San Francisco. Since this one collection, the 

 species has not again been observed. Being unable to identify the 

 species with any described in America, a description is herewith 

 appended, the species being named after its host plant, Pinus sabin- 

 iana. All the specimens, including the types are in the collections 

 of E. 0. Essig and of the University of California, Berkeley. The 

 specimens were all mounted in Canadian balsam before color notes 

 were taken, so those in the following description are only approxi- 

 mately correct. 



Alate viviparous female. Rich chestnut-amber to dark brown. 

 Antennal segments I and II, amber; III, yellowish with tips darker; 

 IV, V, and VI, dark yellow to dusky. Prothorax, chestnut-brown. 

 Thoracic lobes very dark brown to black. Beak, pale with tips dusky. 

 Cornicles, black. Cauda and anal plate with distal margins black. 

 Femora, chestnut-brown with base amber; tibiae, brown with amber 

 ring near the base; tarsi, amber. Wing veins, grayffi stigma, dusky 



Measurements : Body 4.2 mm. long and 1.7 mm. wide at thorax. 

 Antennae reach to base of abdomen, without secondary sensoria. I, 

 0.10 mm. ; II, 0.09 mm. ; III, 0.50 mm. ; IV, 0.25 mm. ; V, 0.19 mm. ; 

 VI, 0.08 mm. ; total, 1.21 mm. Beak reaches to the base of the cor- 

 nicles. Cornicles medium sized and of the usual Lachnus shape, 

 being 



Apterous viviparous female. Chestnut-brown in color with black 

 dorsal spots on abdomen. Antennal segments I and II, dark; III, 

 dusky yellow with tip dark; IV, V, and VI slightly darker. Beak 

 reaches to the base of the cornicles. Coxae, black ; femora, black with 

 basal one-fifth paler; tibiae, black with pale ring near base; tarsi, 

 black. Cornicles, black and conspicuous. They measure 5.2 mm. in 

 length and 3.3 mm. in width. 



