HEDYCHKIDIUM. 459 



perpendicular tooth in the middle, this being absent in Hedychrum ; the latter has the 

 claws cleft at the apex. 



1. Hedychridium cressoni. 



Hedychrum cressoni, Norton, Trans. Am. Ent. Soc. vii. p. 239 \ 

 Hab. Mexico 1 . 



2. Hedychridium guatemalense. (Tab. XX. figg. 4, 4 a.) 



Green, with bluish and golden reflections. Head and thorax coarsely rugosely punc- 

 tured, the scutellum and metanotum more strongly than the mesonotum ; the central 

 part of the metanotum narrowed towards the ape # x ; the sides of this central part with 

 a distinct margin, and raised above the edges of the metanotum, which are roughened 

 by irregular striae, and not coarsely punctured; the sides project at the apex into an 

 acute triangular projection ; the mesopleurse are coarsely rugosely punctured ; the 

 metapleurae are deeply excavated, smooth, shining, and impunctate. Abdomen shining ; 

 the base concave ; the first and second segments are closely punctured ; the third 

 segment is more strongly punctured, especially behind, and is depressed round the 

 extreme apex ; the latter is slightly incised in the middle ; the second segment is large, 

 bluish in the middle and at the base ; the ventral surface is sparsely punctured, and 

 keeled down the middle. The legs are sparsely covered with rather long white hair ; 

 the hind coxae are finely punctured ; the hind tibiae are grooved and rather rough on 

 the outer side; the apical joints of the tarsi are blackish; the claws have a single 

 median tooth, much smaller than the terminal. The front is moderately hollowed, 

 keeled down the centre and transversely striated. The mandibles are black. Looked 

 at from above the head in front is transverse and nearly so behind ; the ocelli are placed 

 almost in the centre. 



Length 9 millim. 



Hab. Guatemala, Zapote, Panzos (Champion). 



3. Hedychridium miliare. (Tab. XX. figg. 5, 5 a.) 



Head concave in front and behind ; the front deeply excavated, the excavation 

 reaching near to the ocelli, and shining ; at the top smooth, the lower half transversely 

 striated and keeled down the centre; mandibles and palpi brownish; the ocelli are 

 placed nearer the frontal excavation than the occiput. The head and pronotum are 

 rugosely punctured, the mesonotum much more strongly so; the scutellum, meso- 

 pleurae, and metanotum are still more strongly punctured ; the pro- and metapleurae are 

 deeply excavated, smooth, and shining. The sides of the metathorax at the apex project 

 into a blunt, shining, impunctate, knob-like point. Abdomen closely punctured, the 

 sides of the first and third segments more strongly than the second (especially the latter 



3 nn 2 



