NO. 1927. DESCRIPTIONS OF NEW HYMENOPTERA, 5— CRAWFORD. 175 



female with the additional data, reared from Agromyza pupa, the 

 allotype male with the record, reared from Agromyza; paratypes, 

 some with each of the above records. 



The species is named after the collector, C. N. Ainslie. 



Type.— C&t. No. 14792, U.S.N.M. 



Genus CLOSTEROCERUS Westwood. 



TABLE OF FEMALES OCCURRING IN THE UNITED STATES. 



1. Wings trifasciate 3. 



Wings bifasciatc 2. 



2. Mesonotum green cinctipennis Ashmead. 



Entire insect brilliant purple or bluish utahensis Crawford. 



3. Head laterad of ocelli smooth, polished winnemanx Crawford. 



Head laterad of ocelli distinctly sculptured 4. 



4. Mesonotum without a median black longitudinal stripe; punctures back of ocelli 



strong, thimble-like; punctures of parapsides as large as those on median area 



Irifasciatus Westwood . 



Mesonotujn with a median longitudinal black stripe; punctures back of ocelli 



crowded but not thimble-like; punctures along inner edges of parapsides smaller 



and more indistinct than those on disk tricinctus Ashmead. 



CLOSTEROCERUS TRIFASCIATUS Westwood. 



This European species has been recorded from the United States 

 and is therefore included in the table. I have seen no specimens of 

 it, all those seen being instead C. tricinctus Ashmead. 



CLOSTEROCERUS TRICINCTUS Ashmead. 



Pleurotropis tricinctus Ashmead., Bull. No. 3, Kansas State Agr. Coll., Appendix 

 p. VIII, 1888. 



CLOSTEROCERUS UTAHENSIS, new species. 



Female. — Length about 0.75 mm. Brilliant purple or bluish- 

 purple, with, a few greenish tints on mesoscutum and the propodeum 

 greenish; head around ocelli and mesonotum wdth crowded shallow 

 punctures, those on back of head becoming somewhat transverse; 

 metanotum narrow, smooth; propOdeum smooth; mngs wdth a dark 

 band at the stigmal vein and one at apex; legs dark, the anterior and 

 middle tibiae on apical half, together with the tarsi, light. 



Male. — Unknown. 



Type-locality. — Salt I^ake City, Utah. 



Specimens received from the Bureau of Entomology, United States 

 Department of Agricultm'e, under Webster note number 6639, with 

 the additional record, C. N. Ainslie, collector, reared from Agromyza. 



Compared with a broken specimen named by Doctor Ashmead as 

 C. cinctipennis, this species is less robust and has the mesoscutum 

 more finely punctured, in addition to the color differences 



Type.— Cut. No. 14788, U.S.N.M. 



