PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued i^^(V>\,0?^i h the 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 90 Washington: 1941 No. 3116 



A REVISION OF THE CHALCID-FLIES OF THE GENUS 



MONODONTOMERUS IN THE UNITED STATES NATIONAL 



MUSEUM 



Bv A. B. Gahan 



The chaiid genus Monodontomerus Westwood is recorded from all 

 the faiinal regions except the Ethiopian and Austrahan. Representa- 

 tives of the genus are in the United States National Museum from 

 France, Germany, Russia, China, Japan, Mexico, Cuba, the United 

 States, and Canada. 



Only those species of which actual specimens are at hand have 

 been included in this revision, since it is impracticable to place the 

 others by their descriptions. The species thus omitted from the key 

 are nitidus Newport, punctatus Thomson, rugulosus Thomson, strobili 

 Mayr, usticensis Riggio and Destefani, vireijs Thomson, laricis Mayr, 

 argentinus Brethes, cupreus (Spinola), inclusus Kieffer and Jorgenson, 

 phormio Walker, schrottkyi Brethes, trichiophthalmus (Cameron), 

 vianai Bl an chard, and nubecula Rondani. 



GENERIC CHARACTERS OF MONODONTOMERUS 



The following combination of characters will distinguish Mon- 

 odontomerus from all other genera placed in the subfamily Monodontorn- 

 erinae: Antennae 13-jointed (scape, pedicel, one ring joint, seven 

 funicular joints, and three club joints) ; flagellum cylindrical, not or 

 oidy slightl}^ thickened toward apex; occiput margined; scutellum with 

 a distinct transverse furrow; postscutellum usually with a median 

 carina; propodeum with a triangular or subtriangular depression 



;i22223— 41 1 461 



