482 Mr. Cameron's descriptions of new 



the latter is a central furrow ; the extreme apex of the scutellum 

 is black, and there is a narrow obscure black line down its centre. 

 Length, 7 nam. 



Closely allied to the European N. hcemorrhoidalis, 

 Spin., and to the North American A'', chloreus, Norton. 

 The occurrence of a Nematus so far south is of much 

 interest, this being the first record of that northern 

 genus in Central America. 



Hah. Northern Sonora, Mexico (Morrison). 



Euura mexicana, n. s. 

 Luteous ; the vertex broadly, the head entirely behind, the 

 middle lobe of the mesonotum, except at the apex, the lateral, 

 except at the sides, the scutellum, excej)t at the apex, breast, meso- 

 pleura behind, metapleura, metanotum, and basal third of abdo- 

 men, black, the black passing into brown at its junction with the 

 luteous. Scape of antennae and the basal joints of flagellum 

 black, the rest fulvous ; they are as long as the abdomen, and have 

 the 3rd joint shorter than the 4th, and are covered with a close 

 pubescence. Lateral sutures on vertex deep, and there is a broad 

 transverse one behind the ocelli. Front projecting, a hollow be- 

 tween it and the eyes ; at its top in the centre is a fovea, and it is 

 separated fi-om the vertex by a cm-ved depression. Clypeus incised. 

 The legs are paler coloxired than the body ; the coxae are black at 

 the base ; the apices of the tarsal joints are fuscous ; claws bifid. 

 The cerci are nearly as long as the metatarsus, pallid yellow. 

 Wings hyaline ; costa pallid ; stigma fuscous, whitish at the base. 

 Apical half of sheath of ovipositor black ; claws bifid. Length, 

 5*5 mm. 



Hah. Northern Sonora, Mexico (Morrison). 

 This comes very near E. ovum, Walsh. 



Hemichroa nigricans, n. s. 

 Black, shining ; tegulae, pronotum at base, apex of femora 

 (anterior broadly), apex of coxa;, trochanters, tibise, and tarsi, 

 white ; apex of hind tibiae and tarsi black. Front finely punctured ; 

 face covered with a white longish pubescence ; frontal area clearly 

 defined ; there is a broad transverse furrow behind the ocelli, and 

 a short longitudinal one issues from its centre to the back of the 

 head ; lateral sutures indistinct ; clypeus broadly incised. Wings 

 hyaline ; costa fuscous ; stigma livid ; the 1st radial cellule much 

 shorter than 2nd ; the transverse radial uervure is received a little 



