70 THE CANADIAN ENTOMOLOGIST. 



Subfamily Spathiin,e. 



Spathius, Nees. 



The following table will aid in determining the species in this genus 

 known to me as occurring in our fauna : — 



TABLE OF SPECIES. 



Wings fuscous or blackish, with 3 white transverse bands (i. e., one white 



band with the base and apex of wing white) 3 



Wings fuscous, with one white band 2 



Wings hyaline or subhyaline, without bands. 



Testaceous ; pleura, metathorax and petiole blackish or fuscous. 



Petiole very long and slender, two-thirds the length of the 

 thorax; legs entirely pale yellow; antennae 24-jointed. ( <$ , 



length, 2.5 to 3 mm.) 6". longipetiolatus, sp. n. 



Testaceous ; abdomen from apex of second segment black. 



Petiole not more than half the length of thorax ; legs pale 



yellow ; antennae 24-jointed. ( <$ , length, 2. 1 mm.) 



6". calif or?iicus, sp. n. 



Black ; face, collar, mesopectus, legs, petiole and basal half of 

 second abdominal segment, testaceous. 



Petiole a little longer than half the length of thorax ; hind 

 femora subfuscous. Antennae 23-jointed. (^, length, 2 mm.) 

 6". claripetinis, sp. n. 



2. Black ; head, apex of petiole, base of second segment, fuscous or 

 piceous ; all femora much swollen ; trochanters, annulus at base 

 of tibiae and the tarsi, white; ovipositor twice the length of abdomen. 

 Antennae 34-jointed. ( 9. , length, 4 to 4.5 mm.), .S. unifasciatus^.n. 



•3. Species for the most part testaceous or brownish-yellow 4 



Species black or dark fuscous. 



Collar, petiole and base of second segment, pale brownish-yellow ; 

 trochanters, base of tibiae and the tarsi, yellowish-white ; 

 sometimes the mesopectus and head more or less rufo-testace- 

 ous ; basal half of second abdominal segment always finely 

 sculptured or shagreened; ovipositor 1^ to 2 times as long 

 as the abdomen. 



9 , antennae 32 to 35-jointed ; <$ , antennas 25-jointed. 

 (Length, from 2 to 4.5 mm.) & simillimus, sp n. 



