6 HYMENOPTERA. 



behind on the upper half; the posterior femora are broadly black above and at the 

 sides, the posterior tibiae more or less black in the middle. The third cubital cellule 

 is perceptibly longer than the second, which has a distinct horny point ; the transverse 

 radial is received not far from the third transverse cubital, the transverse median a 

 very little in front of the middle of the cellule. There is a distinct bulla in the first 

 transverse cubital nervure, and a less clearly marked one in the lower part of the 

 transverse radial. The nervures are black, the costa and stigma testaceous. 



What I take to be the male (from Chiriqui) has the coloration pretty much as I have 

 described ; but the antennae are apparently shorter, and the third cubital cellule is 

 perceptibly shorter than in the female*. The quantity of black on the posterior 

 femora varies. In some specimens, too, the pleurae are entirely testaceous ; in others 

 there is only an irregular splash in the centre. The amount of black on the back of 

 the abdomen varies also. 



4. Strongylogaster illuminatus. 



Strongylogaster illuminatus, Norton, Trans. Am. Ent. Soc. ii. p. 222 ; Cat. p. 154. 18 £ $ 1 ; 

 Cresson, loc. cit. viii. p. 62. 



Hah. Mexico, Cordova (Saussure l ). 



5. Strongylogaster lsetus. (Tab. II. fig. 3, $ ; 3 a, antenna.) 



Lsetus, niger flavo variegafcus, antennarum basi pedibusque flavo-albidis ; femoribus posticis supra nigris ; alis 



hyalinis, stigmate testaceo ; cellula cubitali tertia breviore quam secunda. $ . 

 Long, fere 8 millim. 



Hah. Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 



The antennae are pilose, not much longer than the abdomen, thick, distinctly 

 attenuated and pointed at apex; basal joint not much longer than second, third not 

 much longer than fourth ; basal joint white, second, third, and base of fourth testaceous. 

 Face and mouth yellow, the yellow extending above each side of the antennal fovea ; 

 clypeus slightly and broadly incised. On the thorax, the pronotum, a large triangular 

 mark on mesopleura, a narrow one at the junction with the metapleura, the edges 

 of the middle lobe of mesonotum, scutellum, a triangular mark behind it, and post- 

 scutellum are yellow ; there is a fulvous line on each side of the scutellum (proceeding 

 in the direction of the tegulae), and a transverse one on either side of postscutellum. 

 Abdomen fulvous- testaceous, a broad transverse band at base yellow; a broad trans- 

 verse band next to the blotch, two narrower and interrupted ones behind it, and the 

 greater part of the apical third above and beneath black; extreme apex and sheath 

 yellow. The hinder femora are lined above with black ; the rest of the legs yellowish 

 testaceous. Costa and stigma testaceous, the lower half of stigma yellow; nervures 

 black ; the third cubital cellule is distinctly shorter than the second. There is a bulla 

 * This would appear to be a sexual character with the Neotropical Selandriades. 



