amp:rican iiymknoptera. 201 



Fedor, Texas. This is an Odynerus sensu str. 



It is possible that this may be the % of 0. rufinodus Cress, from 

 New Mexico; there are some essential differences, however, not of a 

 sexual nature; e. g. rufinodus, according to the description, has no 

 marks on the second abdominal segment, no niark on front, the 

 scutellum has two spots, not a continuous li'ie, the posterior tarsi 

 only are dusky, and the fore legs are red a* iie base. The syste- 

 matic position of 0. rufinodus is not stated, biit presumedly it is an 

 Odijuerus sensu str. 



IMijnevvks hcteroMpiliis sp. nov. 



Bl:ick. the pronotiini. postscutelluni, median segment, first abdominal segment, 

 underside of second broadly in the middle, apex of clypeus and greater part of 

 mandibles red ; yellow are a spot on front, the inner portion of the eye orbits, a 

 small spot on the outer orbits near the top, the centre and outer edge of prono- 

 tum. greater part of tegujge, a broad line on apes of scutellum, the apex of the 

 first abdominal segment above, the second more broadly, the line at the sides 

 above directed broadly, obliquely backwards and below on to the sides to the red 

 central line, the apex of the fourth segment broadly yellow in the middle above. 

 Except at the base, the four front legs are red ; the fore femora are marked with 

 yellow at the apex ; the apical half of hinder femora red ; the middle tibipe and 

 tarsi are darker colored. Wings almost hyaline, the radial cellule fuscous viola- 

 ceous, the nervures and stigma black, f. Length to end of second abdominal 

 segment 5 mm. 



Eye incision, face and clypeus densely covered with silvery pubescence. Head 

 strongly, closely punctured. The front and vertex sparsely covered with short, 

 white pubescence. Clypeus broader than long, rounded above ; its apex incised, 

 the sides of the incision forming sharp, triangular teeth ; not much depressed 

 above. Base of thorax not quite transverse, the centre slightly retreating. Apex 

 of postscutellum roundly dilated. First abdominal segment large, cu])-shaped ; 

 a slight depression in its middle at the apex ; the second is not so strongly i)unc- 

 tured as it ; it is longer than usual compared with the breadth ; the apices of the 

 segments are not reflesed. The fiagellum of antenute reddish-brown below. 



Fedor, Texas. 



This species is probably variable as regards the amount of led it 

 bears; the red may be absent from the clypeus, on round the edges 

 on the prothorax, on the sides only of the median .segment, and the 

 red on the first abdominal segment may be marked with black. 



The three little species of this coloration should be separated thus : 



a. First and second abdominal segments reflesed. 



Second abdominal segment immaculate, no mark on front. 



riifiiiodiis Cress. 

 Second abdominal segment with a yellow mark on the base: frcmt maculate. 



fedureiisis. 



TRANS. AM. ENT. SOC. XXXIV. (26) JULY, 1908. 



