1916] Girault — New EncyrtidoB from North America 45 



very short stiff hairs white; a carina between the axillae. Abdo- 

 men and head sculptured like the thorax, the head pubescent like 

 the thorax. The apex of the acutely triangular scutellum reaches 

 base of the abdomen. Scrobes distinct yet the head sublenticular. 

 Frons moderately broad, the lateral ocellus its own diameter from 

 the eyes. 



Described from two females labelled "State Insectary, Cal., 675 

 A, Fresno, Cal., associated with mealy bugs on grape." Types: 

 Catalogue No. 19314, U. S. N. M., two females on tags plus a slide 

 with female head and fore wing. One of the females is a para- 

 type. 



Formicencyrtus gen. nov. (Encyrtini) 



Female: Head ant-like, held nearly horizontally. Runs close 

 to Anusia Foerster but the abdomen is somewhat as in Anastatus, 

 that is depressed (the ovipositor shortly extruded) but in shape it 

 is broadly oval (dorsal aspect), the second segment occupying 

 about half of the surface, segment 6 two thirds as long as 2, the 

 others short. The wings are like large scales but veinless and 

 inconspicuous. Otherwise agrees with the structural characters 

 of Anusia flava Girault except that the scutellum is not triangular 

 but round at apex and there is a minute third mandibular tooth. 

 Type: F. thoreauini, sp. nov. 



Formicencyrtus thoreauini sp. nov. 



Female: Length, 1.58 mm. Reddish brown, the propodeum 

 darker, the abdomen dorsad metallic purplish, yellowish at apex, 

 the funicle and club black, the short, extruded part of the ovipositor 

 whitish. Fore wing gradually narrowing distad, somewhat over 

 three times longer than wide at base, hispid, with minute scattered 

 marginal cilia. Mandibles with two equal acute teeth and a third 

 very minute obtuse one. Hind tibiae with one long, slender spur. 

 Scutellum and axillae lemon yellow. Body coriaceous to sub- 

 glabrous, the propodeum glabrous, non-carinate, pubescent latero- 

 dorsad. Axillae with a very short carina between them, together 

 with the scutellum opaque and more coriaceous than the rest of 

 the body. Dorsal abdomen downy, the hairs white and reclining. 

 Tegulae large; scutellum, scutum and propodeum of about equal 

 length. Dorsal thorax very sparsely hairy. Caudal margin of 



