49 



middle lobe of mesonotuni clearly separated, the jiarapsidal furrows deep 

 and wide with some keels; in the centre is a fine longitudinal keel; the 

 apex is irregularly striated. Scutellum with a fine keel down the center 

 of the base, being continued from a stouter keel on the basal depression. 

 Metanotum with a central area obliquely narrowed at the base and renoh- 

 ing to the apex; on either side of this, at the base, is an area bounded in 

 front by a curved rounded keel; from the outer apical edge of this a keel 

 runs down the sides to the apex. Metapleurae rugose, thickly covered 

 with white pubescence. There is a keel rovmdly dilated in the middle, on 

 the sides of the first abdominal segment and extended in the middle to 

 the apex; the part enclosed by them is smooth and shining, the sides at 

 the apex are strongly closely striated; the second segment is finely closely 

 striated, except on the apical half in the centre. There is a large depress- 

 ion on the lower half of the base of the mesopleurae which bears stout 

 keels; on the apex, in the centre, is a large deep fovea, pointed at the 

 base. Antennae thickly covered with a microscopic pile. The head is fully 

 wider than the thorax; the second abdominal segment is slightly but 

 distinctly longer than the third. If it were not for the latter character 

 I should have placed the species in Sigalphus. 

 1458 Chelonus immaculatus sp. nov. 



Black, the antenna! scape, tegulae and legs white, tinged with testa- 

 ceous, the apex of the hind tibiae and of the metatarsus, black. Wings 

 hyaline, the stigma and nervures black. Female. Length 3.5 mm. San Mar- 

 cos, Nicaragua. 



Head closely rugose, opaque, the face wrinkleil; the clypeus clearly 

 separated, more finely punctured than the face; mandibles rufo-testaceous. 

 Central part of mesonotum closely, finely reticulated, the apical part 

 coarsely reticulated,, the furrows bounding it with stout transverse keels. 

 Scutellum finely rugose, the transverse depression at its base deep, wide 

 and with four keels. 



1159 Chelonus centralis sp. nov. 



Black, the antennal scape, underside of flagellum, four anteri(ir legs, 

 base of hind tibiae to shortly beyond the middle, the middle femora 

 broadly above^ black; the hind tarsi white; wings hyaline to the stigma, 

 smoky beyond. Female. Length 2.5 mm. San Marcos, Nicaragua. 



Face and clypeus finely rugose, thickly covered with long white 

 pubescence; the front and vertex coarsely rugose. Mesonotum strongly 

 reticulate. Scutellum closely rugose, almost reticulated; at its base are 

 three areae. Metanotum coarsely irregularly rugose, the apical slope with 

 some longitudinal keels, the two central uniting before reaching the apex; 

 the sides near the top project into teeth. Abdomen closely reticulated, 

 more closely at the base than at the apex. Pleurae closely, strongly reti- 

 culated. 



1461 Phaneratoma? nigroscutis sp. nov. 



Rufo-testaceous, the scutellum, the apical half of the second and the 

 whole of the third abdominal segments, black. Legs testaceous, the hind 



