February, igo2] FSICHE. 309 



as the most characteristic feature of our fore the use of the term Ellipes (tAXtTrr;?) 



small species is the loss of the metatarsus for the group. 



which is described by Palisot as present Our species may be separated by the 



in the African species. I suggest there- following table : — 



A'. Larger forms, more than 5.5 mm. long. Pronotum with a delicate transverse 

 sulcus near middle of anterior half; fore tjbiae of male sometimes deeply fissate ; 

 hind tibiae with 4 pairs of long natatory lamellae, preceded by slight serrations, and 

 armed at tip on either side with two very unequal calcaria, the longest scarcely 

 longer than the metatarsus, the only member of the tarsi present (Tridactvlus). 

 b^. Larger, from 7-9 mm. long, of highly variegated coloring, especially 

 conspicuous on pronotum and hind femora. ..... apicalis. 



//-. Smaller, from 6-7 mm. long, of tolerably uniform dark fuscous coloring, 

 the hind femora generally feebly and rather inconspicuously but sometimes 

 distinctly marked with testaceous. ...... tcnninalis. 



K^. Smallest forms, less than 5.5 nun. long. Pronotum with no transverse sulcus ; 

 fore tibiae of male never fissate ; hind tibiae with a single pair of short natatory 

 subapical lamellae, the margins of the tibiae smooth, armed at tip on either 

 side with two very unequal calcaria, the longest about half as long as the tibia, the 

 tarsus wholly wanting or at least practically invisible (Ellipes). . . tniriuta. 



Tridactylus apicalis Say. (Gu^rin), Mexico (Saussure), Guatemala 



I have seen specimens of this species (Saussure), Ecuador (Bolivar), South 



from Ithaca, N. Y., July 28-30 (Pearce), America (Brunner), and Burmah (!) 



Quincy, 111., Sept. (McNeill), Maryland (Brunner). 

 (Uhler), Ames, Iowa, Aug. 14 (Osborn), 



Kentucky (Wild in Uhler 's coll.), Geor- Tridactylus terminalis Uhler. 

 gia (Morrison), Dallas, Tex. (Boll), Specimens before me come from Win- 

 San Diego, Cal. (Crotch), Los Angeles, Chester, Mass., Nantucket, Mass., July 

 Cal. (Crotch, Morse), San Bernardino, 13 (Morse), Staten Isl., N. Y., (Davis), 

 Cal., July 16 (Morse). It has also been Maryland (Uhler), Southern Illinois 

 reported from several of these points (Uhler), Carolina (Schaum), Agricul- 

 and from Staten Island, N. Y. (Davis), tural College, Miss., Oct. (Weed), and 

 New Jersey (Smith), Indiana (Blatchley), Dallas, Tex. (Boll). It has further been 

 Minnesota (Lugger), Nebraska (Brun- reported from Cambridge, Mass. (Send- 

 er), Carolina (Saussure) , Alabama der), Connecticut (Smith), New York 

 (Scudder), S. Carolina (Burmeister), (Beutenmiiller), New Jersey (Smith), 

 Council Bluffs, Mo. (Say), St. John's Indiana (Blatchley), Illinois (McNeill), 

 River, Fla. (Say). New Orleans, La. Minnesota (Lugger), Nebraska (Bruner), 



