Y84 PROCEEDINGS OF THE NATIONAL MUSEUM. vou xxvi. 



cxi):iihI('(1, not distinctly davate, and is very distinctly sulcate exter- 

 nallv. hut this sulcntion is (iiiite obviousl}^ due to shrinkage as the left 

 tihiie is more coiispicuously sulcate than the right one. Such shrink- 

 a*n' is not renuirkuble as the sjjecimen was alcoholic and described 

 after diving. The describer gives the length as 0.56 inch in length, i 

 wliich is piiictically 1-t mm, But, as above stated, the type really 

 measures 1(5.5 mm. in length. Why Thomas gave this erroneous i 

 measurement is not cleai-, nor is it clear why McNeill used it as a 

 synoptic character when he had the original type before him. 



The type of carpenteril^ which is an admitted synonym of davaius, isil 

 18 mm. ill length, the fore tibiae strongl}^ clavate and not at all sulcata t 

 externally. I'he type of clypsedra is not at present in the United 

 States National Museum as mentioned by McNeill, nor is the original 

 type a male from New Mexico, but females from farther north on thei 

 Sour is River. 



The range of variation presented by the types of chduitKS and car-i\ 

 pente)ni more than covers all variation found among the specimens of 

 clejmjdra. Therefore if clavatvs and carpentert't are synonymous, and 

 I agree with McNeill in so considering them, clyp^edra must also be a 

 synonym. That this is a valid conclusion is pretty evident when, 

 a long series of specimens from different parts of the country and from 

 various altitudes is examined. The anterior tibias of the males vary 

 considerabl}^ in the amount of apical expansion, though none examined 

 are quite so conspicuously clavate as in the type of carpenterll. The 

 elytra of the males are also variable, reaching quite to the tip of the 

 abdomen in some specimens and in others falling noticeably short of it. 

 The elytra of the females also vary in length, but never nearly reach 

 the tip of the abdomen, generally onh" about as long as the pronotum.i 



29. BOOPEDON NUBILUM Say. 



GV////W.S nu.hlhi.'f Say, Jouni. Acad. Nat. Sci. Pliilad., IV, 1825, p. 308. 



This species was found quite abundant in open woodlands in thi 

 vicinit}^ of Victoria, Texas, during the lattei' part of flune and in July, 

 Only mature individuals were seen. 



30. STIRAPLEURA DECUSSATA Scudder. 

 Stirapleura decuHsata Scuddek, Ann. Kept. Chief iMig., 1876, ]>. 510. 



Nine males, 15 females. Golden May 21); Sedalia June 15 and 21 

 Denver May 10 to July 16; Baileys July 13; Boulder June 9. 



The foveolse of this species, according to McNeill's tables in hi. 

 revision of the Tryxalina^, are as long again as wide. Therefore thest 

 specimens could be called ddiattula as justitialily as they are callec 

 decmmta for the foveohe are usually l)iit little longer than wide 

 DecuKsatK and ddkatidn may prove to be forms of one species. 



