554 CALIFORNIA ACADEMY OF SCIENCES. 



The species comes nearest to M. dei^hon Walk, but 

 its smaller size, the metallic colored anterior and middle 

 femora and the shape and relative length of the abdom- 

 inal segments readily distinguish it. 



Catolaccus Thomson. 



35. Catolaccus tepicensis sp. n. 



$ . — Length 1.8 mm. yEneous black, the dorsum of 

 mesothorax and the scutellum bronzy-green, finely closely 

 punctate and clothed with a fine whitish pubescence. 

 Scape, knees, tibia; and tarsi, brownish-yellow, the tibiae 

 medially more or less obfuscated; mandibles rufous, the 

 teeth black; wings hyaline, the veins light brown. Head 

 transverse, wider than the thorax. Ocelli whitish. An- 

 tennee 13-jointed, the pedicel not quite as long as the first 

 joint of funicle, the last two joints of funicle a little wider 

 than long. Marginal vein of front wings i3^ times as 

 long as the stigmal, the latter a little shorter than the post- 

 marginal. Abdomen conic-ovate, a little longer than the 

 head and thorax united, aeneous black, clothed with a 

 sparse white pubescence beneath. 



Described from one ? specimen from Tepic. 



Elasmus Westwood. 



36. Elasmus sp. 



Of this interesting genus there is a single ? specimen 

 from Tepic, but with the abdomen and hind legs gone 

 and in too poor a condition to satisfactorily describe. 



Ceratoneura Ashmead. 



37. Ceratoneura mexicana sp. n. 



$ . — Length 2.2 mm. Black, shining, but with the 

 upper surface of the thorax finely alutaceous, the face 

 strongly striated. Trophi white. Scape, pedicel and 

 legs, except coxae and base of femora, brownish -yellow. 



