XXxii, '21] ENTOMOLOGICAL NK\VS 43 



hairlikc bristles on posteroventral. Prealar minute. Arista 

 short-haired. 



A female from Omilteme .has the hind femur with two 

 cr three bristles near base and four or five on apical third 

 on anteroventral surface and the posteroventral surface bare. 



Bo'.h sexes have the palpi black and the antennae almost 

 so. 



Spilogaster parvula. 



A female from Tepetlapa, Guerrero. This species has the cross- 

 veins less distinctly infuscated than in the other species of 'the 

 obscurinervis group and the hind tibia with three anterodorsal and 

 one posterodorsal bristle. The palpi at apices and all of third antennal 

 segment are infuscated and the arista long haired. Thoracic bristles 

 as in the preceding species. 



Belongs to Helina R.-D. 



Spilogaster copiosa. 



A male and female from Omilteme, Guerrero. Postsutural dorso- 

 centrals three, prealar minute or absent, arista short haired. Fore 

 tibia with one to three posteroventral bristles, hind tibia with three 

 anterodorsal bristles and one to three posterodorsal setulae, cross- 

 veins not infuscated. 



Belongs to Hcllna R.-D. 



Leucomelina corvina. 



A male in poor condition, Orizaba. This is a L'nnnophora. 



The thoracic dorsum in front of suture has three contiguous black 

 marks, and behind the suture three contiguous black vittae, the one 

 on each side not extending to scutellum. The second and third ab- 

 dominal tergites each have a pair of large triangular black spots and 

 the fourth has a smaller central spot. Mid tibia with one posterior 

 bristle. 



Leucomelina deleta. 



One male, Omilteme, (lucrrero. A Limnophora. 



Differs from corrina in having a pubescent arista, eyes much closer 

 together, thorax with three pairs of dorsocentral bristles, mid-tibia 

 with two posterior bristles, and the abdomen with the paired dorsal 

 spots extending from base to apex on each tergite, their inner margins 

 straight, the outer concave in center. 



Leucomelina minuscula. 



( >ne female, Atoyac, Yera Crux. Yery closely resembles 

 deleta. The midtibia has OIK- posterior bristle and the spots 



