NORTH AMERICAN HYMENOPTERA. 257 



ISphieroplitlialina separata Smith. 



Female. — Head aucl abdomen black ; thorax and legs ferruginous ; the head a 

 little wider than the thorax, slightly narrowed and rounded behind ; the thorax 

 somewhat fiddle-shaped and finely rugose ; legs obscurely ferruginous ; abdomen 

 with a sharp carina in the middle from the base to the apex of the second seg- 

 ment ; the margin of the basal segment and an elongate angular spot at the base 

 of the second segment of silvery white pubescence ; the second segment with 

 two ovate, pubescent, pale yellow macnlae ; the following segments with white 

 ])ubescence. Length 6.5-8.5 mm. (Smith.) 



Hab. — Mexico, Orizaba. 



Spliseroplitlialnia blaiidina Smith. 



Female. — Ferruginous; the head and thorax finely rugose; the flagellum of 

 the antenna; and the tips of the mandibles black ; the head wider than the tho- 

 rax and subquadrate ; the latter fiddle-shaped, its margins crenulated ; the apical 

 margin of the basal segment of the abdomen, and the middle of the basal margin 

 of the second with bright golden colored pubescence, with two ov^ate spots of the 

 same color near the apical margin of the second segment ; the apical margins of 

 the rest of the segments with bright golden pubescence ; a black spot between 

 the ovate maculse. Length 6.5-7 mm. (Smith.) 



Hab. — Mexico, Orizaba. 



Genus 4, PIIOTOPSIS Blake. 



Body unicoloroLis, smooth and shining; head transverse; eyes 

 hu'ge, round and prominent; ocelli large; antennae long and slender; 

 basal joint of anterior tarsus deeply emarginate ; thorax narrowed 

 posteriorly ; wings hyaline, sometimes slightly clouded, stigma promi- 

 nent ; abdomen spar.sely clothed with pubescence, basal segment more 

 or less petiolate, apex of male furnished with two minute recurved 

 .spines. Female unknown. 



The species may be tabulated as follows : 



Abdomen petiolate. 



Wings with two fsubmarghial cells. 



Wings yellow, with fuscous spot on posterior margin iiioixlica. 



Wings subhyaline, fuliginous spot on posterior margin Orizaba. 



Head black, thorax honey yellow, first abdominal segment rufo-testaceous, 



wings ample iiokoiiiis. 



Second abdominal segment coarsely punctured ; anterior wing bifasciate, 



with dusky on apical half <laiiaus. 



Abdomen with pale yellowish pubescence; wings faintly yellowish ; 



anterior pair with du.sky spot on anterior margin..uilic*oIor. 



Wings varied at apex with dusky spots ; apical segments of abdomen black- 



i.sh, with long white pubescence clara. 



TRANS. AMER. ENT. SOC. XIII. (33) SEPTEMBER, 1886. 



