BRACHYGLUTINI 193 



4. Excavation of int€rmediate femora with the apical edge erected into 



a blunt recurved tooth; 1.4 mm. long; Mexico denticulatum 



Excavation of intermediate femora without an apical tooth 5 



5. Apical end of intermediate femora with a deep, narrow notch or con- 



striction on the dorsal face just distal to the apical end of the ex- 

 cavation ; 1.6 mm. long planiceps 



Apical end of intermediate femora with no notch on dorsal face distal 

 to excavation 6 



6. Excavation of intermediate femora with the spine of the basal edge 



arcuate and aciculate, excavation deep on dorsal face beneath the 

 spine and narrowing and becoming shallow on posterior face; 1.7 



mm. long; known from Cuernavaca, Morelos, Mexico schmitti 



Excavation of intermediate femora with the spine of the basal edge 

 straight and bluntly truncate, excavation very broad and deep, semi- 

 lunar in shape and extending broadly over the posterior face; 1.35 



mm. long; known from Panama Canal Zone 



noctiphoton new species 



Decarthron noctiphoton new species 



Holotype Male. Measurements: Head 0.221 x 0.335 mm. through the eyes; 

 pronotum 0.30 x 0.335 mm.; elytra 0.469 x 0.67 mm.; abdomen from a dorsal 

 view 0.368 x 0.58 mm. (first tergite 0.30 x 0.58 mm.) ; total length 1.35 mm.; 

 greatest width 0.67 mm. (PI. XVI) 



Color, pubescence and punctation as in chichion. 



Head as in chichion save that the eyes are larger (0.11 x 0.067 mm. from a 

 dorsal view) and composed of about 40 coarse facets, the eyes more conical and 

 less reniform. Vertex less flattened anteriorly, more tumid between vertexal 

 foveae; vertexal foveae larger, of the diameter of an ocular facet, otherwise 

 similar. Front evenly truncate between antennal bases and dropping vertically, 

 obliquely to anterior margin of epistome ; fronto-clypeal slope nearly glabrous, 

 not scabroid. Labrum as in chichion. Ventral surface of head as in chichion. 



Antennae ten-segmented, distantly inserted as in chichion, but "normal", 

 of the form and proportions as illustrated. The only structural feature to be 

 noted in addition is a finely pubescent, sharply-defined depression occupying 

 the apical third of the ventral face of the distal (tenth) segment. 



Maxillary palpi as in chichion save that the second segment is quite dif- 

 ferent: thicker in peduncle, more gradually enlarged apically to the apical third 

 where it is then more suddenly and subacutely dilated ; fourth segment thicker 

 than in chichion. 



Pronotum as in chichion. 



Elytra as in chichion save that discal stria is half as long as elytra. 



Wings long and well-developed. 



