Hymenoptera from Central America. 371 



being about the same as tliat bounded by the first recurrent 

 and first transverse cubital nervures. The fore femora have 

 a line of coarse deep punctures on the lower side ; the tibige 

 and tarsi are strongly spinose ; the hind claws bear four 

 stout blunt teeth, closely pressed together. 



This species approaches the North-American Sphex bifove- 

 atusj 'J'aschenberg, but, inter alia, is readily separated by 

 the dark violaceous wings, Taschenberg's insect having 

 them " subhyalinis." 



Fam, Bembicidae. 

 Bembidula, Burm. 

 Bemhidula affinis, sp. n. 

 Long, fere 11 millim. $ . 



Hah. jMexico, Dos Arroyos in Guerrero {H. 11. Smith). 



Allied to B. capnoptera, Handl., but smaller, the markingg 

 of a paler yellow, and the labrum entirely black. 



Antenna? bhack, the scape yellow beneath ; covered with a 

 pale down, which is thicker towards the apex of the flagellum ; 

 the clypeus is yellow, except round the apex ; tiie inner orbits 

 yellow to a little above the middle of tlie ejes, the outer orbits 

 more narrowly lined with yellow, except at the top and apex. 

 The labrum, front, and vertex rather thickly covered with 

 silvery-white hair. Thorax thickly covered with short 

 silvery pubescence, which becomes golden in hue towards the 

 base of the mesonotum ; two short marks at the base of the 

 mesonotum, a broad line from near the base of the tegulse to 

 the base of the scutelkun, two broad marks at the side of the 

 scutellum, but not reaching its apex, the postscutellum, an 

 interrupted line (broad at the ai)ex) along the side of the 

 median segment, a line on tlie mesopleurje under the tegulai, 

 and the apex of the median segment at the sides, broadly, 

 lemon-yellow. The mesopleuras are obscurely punctured, 

 thickly covered with white hair; the metapleuraj more 

 shining and deeply excavated. The abdominal segments are 

 broadly banded with lemon-yellow at the apex, tiie bands 

 being distinctly interruj)ted in the middle ; the apical segment 

 above with some large distinctly separated punctures j beneath 

 bluntly keeled down the middle. Legs : the coxae, tro- 

 chanters, and femora to near the apex black, for the rest 

 yellow, except the tarsi, which have a rufous tinge, especially 

 towards the apex, the base being clear yellow. The wings 

 have a faint fulvous tinge. 



