*'■- 



..* 



378 



Say^s Descriptions of 



pair, but on the posterior pair extending on the inferior 

 surface to the tip : venter immaculate. 

 Length two fifths of an inch. 



Stigmus, Jur. Latr. 



. 1. S. parQlUlm. This species resembles nive fraternus 

 Nob. but it may be distinguished by the following com- 

 parative characters. The posterior thighs and middle of 

 the tibiae are black. The stio;ma is a little smaller. The 



o 



dividing nervure of the first and second cubital cellules is 



F 



parallel to the posterior nervure of the second discoidal 

 cellule ; whereas in the fraternusy thq latter is more 



obli 



que. 



The size Is much the same. 

 Inhabits Mexico. 



The Stigmus fraternus^ is not uncommon in Indiana, 



+ 



and as in the present species^ the hypostoma of the male 

 is somew^hat silvery. 



2. S. pusillus. Petiole obsolete : second cubital cel- 

 lule larse. 



O 



Inhab. Indiana. 



Body blackj polished : head before and mouthy includ- 

 ing the mandibles, whitish: anfeiince honey-yellow; basal 

 joint before, whitish : wings hyaline ; nervures pale 

 brownish ; stigma fuscous ; second cubital cellule large, 

 somewhat longer than broad : feet honey-yellow ; ^poste- 

 rior pair blackish ; abdomen with a very short petiole, 

 almost sessile. 



Length about one twelfth of an inch. 



This is much the smallest species I have seen. The 

 dividing nervure of the first and second cubital cellules is 

 exactly opposite to the posterior neriTire of the middle 

 discoidal cellule. The hypostoma of the female Is black. 



