72 



U. S. NATIONAL MUSEUM BULLETIN 216 



PART 3 



strong because the apex of clypeus is impressed on each side of it; 

 temple moderately wide and convex; tyloids linear, sharp but rather 

 weak, extending about 6 segments; mesoscutum strongly mat, with 

 dense small but moderately strong punctures; mesopleurum with 

 dense wrinkling that covers it with small polygonal cells that resem- 

 ble punctures ; second tergite wealdy mat, with medium sized, strong, 

 adjacent or subadjacent punctures; ovipositor sheath about 0.47 as 

 long as front wing; ovipositor rather strongly compressed, its tip as 

 in figure 327,i. 



Head, body, and appendages uniformly black. Wings lightly in- 

 fuscate in male, rather strongly infuscate in female. 



One cocoon is at hand. It is elongate elliptic, almost cyUndric 

 with rounded ends, dense, opaque, with a Httle loose silk outside, and 

 grey-brown in color. 



Figure 24. — Localities for 

 Gambrus bituminosus. 



This species is related to (Hygrocryptus) Gamhrus wadai (Uchida) 

 1936, of Japan. It has no near relatives in America. Gamhrus wadai 

 is a new combination. 



Specimens: 9, Antioch, CaUf., July 18, 1947, P. D. Hurd (Berkeley). 

 9, Antioch, Cahf., Aug. 6, 1955, E. S. Ross (San Francisco), d", 9, 

 reared from Pyrausta nubilalis in Xanthium, New Haven, Conn., 

 June 16, 1938, N. J. Nerney (Washington). 9, Billys Island, Okefe- 

 nokee Swamp, Ga., June 1912 (Towncs). 9, Brunswick, Ga., May 2, 

 1911 (Townes). 9, St. Simons Island, Ga., April 22 to May 12, 1911, 

 J. C. Bradley (Ithaca). 29, reared from "aS*. validus," Beach in Lake 

 Co., 111., Aug. 14, 1929, Satterthwaite (Washington), cf, Chicago, 

 111., F. H. Chittenden (Washington), cf , Baton Rouge, La., Jan. 13, 

 1923, T. H. Jones (Washington). 9, reared from Diatraea, Grand 

 Isle, La., Jan. 12, 1937, T. E. HoUoway (Washington). cT, 9, reared 

 from Pyrausta nubilalis, Belmont, Mass., July 15, 1957, W. A. Baker 



