ART. 9 DIPTERA FEOM AMERICA, ASIA, AND JAVA ALDEICH 23 



infrasquamal setules. Propleura and prosternum bare. Abdomen 

 mostly shining black, basal two-thirds of second segment, one-half of 

 third segment, and two-thirds of fourth segment with gray pollen. A 

 delicate median black line on these segments. No marginals on 

 first segment, those of second depressed and inconspicuous, third with 

 a median pair and two lateral, fourth with a marginal row and a 

 single subdiscal pair far back. Genitalia black. Legs black (only 

 hind ones present) ; hind tibiae with rather dense fringe of uniform 

 bristles on anterodorsal side. Hind pulvilli and claws elongated. 

 Wing considerably brownish except along the veins. Costal seg- 

 ment beyond the first vein only slightly longer than the one before 

 it. Calypters white; margin narrow, brownish yellow. 



Length, 7.4 mm. 



Female. — Front 0.37 of head width (the same in two) ; usual two 

 pairs of orbital bristles, below the lowest frontals a distinct pollinose 

 dark band extends from the eye to the suture (faintly indicated in 

 male). Hindmost sclerite of venter broadly rounded. Middle tibia 

 with two bristles on anterodorsal side. Claws and pulvilli small. 



Length, 5.7-7.7 mm. 



Type.— Male, IT. S. N. M. No. 43695. 



Remai'ks. — Described from one male and three females (one of the 

 latter considerably broken), reared from Popillia japonica Newman; 

 male and two females at Toyona, Japan, July 9, 1930, by T. R. Gard- 

 ner; the other female, which is broken, at Takarozawa, Japan, by 

 C. P. Clausen, July, 1928. The species is named in honor of C. P. 

 Clausen, who has made an extensive study of the Japanese beetle 

 parasites in Japan and adjacent regions. 



Genus EXORISTOIDES Coquillett 



Exoristoides Coquillett, Eevisiou of the Tachiuidae of America north of Mex- 

 ico, p. 90, 1897.— Walton, Proc. Ent. Soc. Washington, vol. 17, p. 98, 1915.— 

 AxDEiCH and Webber. Proc. U. S. Nat. Mus., vol. 63, art. 17, p. 10, 1924. — 

 CuKEAN, Can. Ent., vol. 58, p. 85, 1926. 



Exoristopsis Townsend. Proc. U. S. Nat. Mus., vol. 49, p. 426, 1915. 



The genotype of Exoristoides, designated by Coquillett in 1897, is 

 johnsoni Coquillett; that of Exoristopsis, designated by Townsend 

 in 1915, is setifera Townsend. 



The genus has the general characters of ExoHsta of authors 

 {Zenillia sens. lat. of Aldrich and Webber, 1924), with the addition 

 of a large pteropleural bristle and almost invariably some setules on 

 the first vein. Curran suggests that Lypha is a near relative, which 

 is true. Townsend placed one of our species {slossonae) in Lydina 

 {Polidea of authors), in the National Museum collection some years 

 ago, and this also expressed a true relation. Lypha may be distin- 



