22 NEW NEOTROPICAL EVANIIDAE (hYMENOPTERA) 



Key to Sjjecies of Evania here considered 



1. Malar space over one-half as long as eye; head smooth and onlj^ minutely 



punctate; thorax entirely black appendigaster Linnaeus 



Malar space less than one-half as long as eye; head with some coarse or 

 conspicuous punctures; thorax not entirely black 2 



2. Metunapleura with a conspicuous, i«jlislied, impunctate, oblique-longi- 



tudinal area 3 



Metunai)leura without a consi)icuous, })olishcd, impunctate, oblique- 

 longitudinal area 



3. Dorsum of petiole with pronounced longitudinal carinae and rows of large 



irregular punctures bella new species 



Dorsum of petiole without pronounced longitudinal carinae, polished, at 

 most with some small, scattered punctures 4 



4. Mesopleural sulcus of average depression, species 5 mm. or over in length, 



head, thorax and petiole entirely light ferruginous 5 



Mesopleural sulcus noticeably depressed, species 3 mm. in lengtli, i)etiole 

 and ventral and caudal portions of thorax black . . . delicata new species 



5. Mesopleura with a row of conspicuous reticulate or subcjuadi'ate punctures 



adjacent to interpleural suture luculenta new species 



Mesopleura without a row of conspicuous reticulate or subquadrate punc- 

 tures adjacent to interpleural suture clara new species 



6. Pronotum forming a collar visible from above on same plane as mesoscutum, 



and about one-half as wide as length of pedicel; petiole coarsely striate 

 and piuictate; posterior fennu' with numerous long, slender stiff setae. 



barbata new species 

 Pronotum not forming a collar visible from above on same plane as meso- 

 scutum; petiole polished and with but few small punctures; posterior 

 fenuu' with short hair-like setae 7 



7. Head with a sharply outlined, polished, V-shaped carina ventrad of in- 



sertion of antennae; mesopleura ferruginous; petiole with distal half 

 yellowish-white; flagellar segments one to three yellowish-white. 



cerviculata new specues 

 Head without a sharply outlined, jjolishetl, V-shaped carina ventrad of in- 

 sertion of antennae; mesoi)leura black; petole and antennae l)lack. 



mystica new species 



Evania appendigaster Linnaeus 



IVjur iiuilcs, taken at Parintins, Flores and Obidos, Brazil, 

 and Yuiimagiias, Peru, on October 3, 1919, November IS, 1919, 

 August 14, 1919 and April 20, 1920, respectively. The six'cinien 

 from Peru is slightly smaller than those from Brazil. 



Evania bella new species 



Mal(!. I^ength 5.5 nun. 



Head, scaj)e, pedicel, proximal half of llagellum, tliora.x, i)r()p()(lciiiii, ix'liole, 

 fore and middle legs, hind coxa, trochanter, tarsus, i)n)\iiii;d end nf femur and 



