20 PEOCEEDINGS OF THE XATIONAL MUSEUM vor,. G9 



pale testaceous, while the posterior coxae are usually black. It 

 differs from dlvi-iui and TQura'AQi fulve^cen^ in the strongly bulging 

 temples and ohesk^, and in the shorter inner spur of posterior tibiae, 

 also in the longer apical segment of posterior tarsi. Propleura com- 

 pletely polished; radius arising only slightly beyond middle of stigma; 

 hyaline spots in first cubital and second discoidal cells large, confluent, 

 more conspicuous than in divisus, the first cubital cell being enth'ely 

 hyaline except at extreme apex. Head black; thorax black, with 

 the pronotum, propleura, and mesonotum testaceous; sometimes 

 mesopleura testaceous above; abdomen entirely testaceous; coxae, tro- 

 chanters, apex of hind tibiae, and the hind tarsi black; occasionally 

 the hind coxae testaceous. 



The type and the nine specimens which are in the National Mu- 

 seum are all males. The localities represented are points in Colorado, 

 New Mexico, and Kansas. 



5. CRASSOMICKODUS FALLENS (Cresson) 



Microdus pallens Cresson, Canad. Entom., vol. 5, 1873, p. 53. 



Type. — No. 2746, Academy of Natural Sciences, Philadelphia, 

 Pennsylvania. 



Most specimens of this species closely resemhle fulvescens in color, 

 but can be readily separated from that species by the following 

 characters: Inner spur of hind tibia more than half as long as the 

 basitarsus; last segment of hind tarsi not distinctly longer than the 

 third and much shorter than the second; malar space in the male at 

 least two-thirds the eye height, and in the female nearly as long as 

 the eye height ; temples and cheeks not strongly bulging, the latter 

 sloping rather evenly, not conspicuously rounded, as seen from in 

 front ; hyaline spot in anterior wing less distinct than in fvlvescens; 

 length normally 4 to 5 mm. Color usually rather uniformly testa- 

 ceous; head sometimes more or less blackish, very rarely entirely 

 black; antennae black, the scape usually reddish beneath; propodeum 

 sometimes blackish; legs usulilly entirely yellow, except the apex of 

 hind tibiae and the hind tarsi, which are black; but occasionally the 

 anterior and middle coxae and trochanters, and very rarely the 

 posterior coxae and trochanters as well, blackish. 



The type is from Illinois; specimens in the United States National 

 Museum are from Providence, Rhode Island; Huntsville and New 

 Boston, Texas; Georgia; Massachusetts; Rossljm, Virginia; Alabama; 

 and Riverton, New Jersey. I have also seen two specimens from 

 Meredosia and Havana, Illinois, which are in the collection of the 

 University of Illinois. 



