476 



PROCFlEDlNGf^ OF THE NATIONAL MUSEUM. 



VOL. 41. 



Fig. 18.— Apical margin of the 

 produced portion of the 



CLYPEUS OF TrYPOXYLON POLI- 

 TIFORME ROHWER. FEMALE 

 SEEN FROM ABOVE OBLIQUELY. 



Fig. 19.— Pygidium of the 

 female of trypoxylon 

 politiforme rohwer. 



TRYPOXYLON POLITIFORME, new species. 



Male. — Length 21 mm. Agrees well with hasale from wliich it may 

 be separated by the abdomen, which is very like politum. The 

 abdomen differs from politum in the segments not being depressed 

 basally; the first and second dorsal segments are 

 narrowly depressed apically. Wings with a 



bronzy-purple reflec- 

 tion. Except where 

 mentioned the descrip- 

 tion of hasale will apply 

 well here. 



Female. — Length 23 

 mm. The description 

 of hasale would do well 

 for tliis species except the abdomen which is like politum (excepting 

 the first segment is more elongate and not ungulate ventrally). The 

 pygidium is like hasale, see figure 19. 



Berwick, Louisiana. Many males and females collected May 3 and 

 8 by Mr. E. G. Titus. Florida, one male; Georgia, one male. 

 Type.—Csit. No. 14171, U.S.N.M. 



TRYPOXYLON MEXICANUM (Saussure). 



Trypoxylon albitarse, var. mexicana Saussure, Reise d. Novara, Zool., vol. 2, 

 1867, p. 77 not Trypoxylon mexicanum Saussure, same reference, p. 78, No. 

 4, pi. 4, fig. 45. 



Specimens which agree well with Saussure's description of albitarse 

 and have rufous mandibles, characteristic of his variety mexicanum, 

 have been determined, as that species. They are 

 from the following locahties: Mexico (C. F. Baker 

 collection); Cordova, Mexico 

 (collected by Dr. L. O. How- 

 ard, May 10); Guanajuato, 



Eus OF Trypoxylon McxicO (collected by A. Du- 



MExicANUM (SAus- ges) ; San Autonio, Nicaragua, 



SURE). Female SEEN ,i & ^ 



FROM ABOVE OB- collected May, 1899. 



liquely. rpj^-g specjgg is easily sepa- 



rated by the following table 

 is verv little variation 



Fig. 20.— Apical mar- 

 gin OF THE PRODUCED 

 PORTION OF THE CLYP- 



CT 



Fig. 21.— Lateral view of 

 the basal segment of 

 Trypoxylon mexicanum 

 (Saussure). Male. 



In the specimens mentioned above there 

 The apical joint of posterior tarsi is black. 



TRYPOXYLON GANDARAI, new species. 



Male. — ^Length 22 mm. Median produced portion of clypeus 

 broadly rounded apically, lateral teeth small and obtusely rounded 

 apically; head and thorax very hke hasale; tooth of the first ventral 

 segment near basal third, not as strongly hooked as mexicanum, but 

 otherwise similar; first and second dorsal segments narrowly depressed 

 apically, but not at all basally; second dorsal subequal in length with 



