8 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.61 



KEY TO THE SPECIES Oli' LEUCOSPIS FABRICIDS IN THB PEINCIPAL MUSEDIIS OF THE UNITED 



STATES. 



1. Pronotum without a transverse carina parallel to its hind margin (very 



faint in tcxana) 2 



Pronotum with one or two carinae parallel to its hind margin 13 



2. Ovipositor a short spur or reflexed dorsally reaching forward less than 



one-half length of abdomen 3 



Ovipositor reflexed dorsally, reaching forward more than one-half length 

 of abdomen 8 



3. Hind femur with few large teeth ; ovipositor a short erect spur, not reach- 



ing around apex of abdomen 4 



Hind femur with numerous small teeth ; ovipositor reflexed dorsally around 

 apex, extending forward less than one-half length of abdomen 5 



4. Spur between scapes prominent and coarsely sculptured lilie rest of face; 



median ocellus without parallel ridges on each side ; space between lateral 

 ocelli and eye not different in sculpture from rest of vertex, female 



6.8 mm 1. slossonae, new species. 



Spur not so prominent and not so coarsely sculptured as rest of face ; median 

 ocellus with parallel ridges on each side; striae from lateral ocelli to 

 compound eyes; yellow transverse band near hind margin of pronotum 

 contains a faint carina, male 6.8 mm 2. texana Cresson. 



5. Wings fuliginous with transparent streak longitudinally through center 6 



Wings transparent, front edge lightly smoked 7 



6. Propodeum in median line twice as long as metanotum, median carina high, 



thin, abruptly angled behind, female 7.6 mm 3. metallica, new species. 



7. Occipital carina behind ocelli straight; united abdominal segments behind 



second much longer than second and longer than rest of abdomen ; apical 

 margin of sixth and following segments densely clothed with golden pile ; 

 ovipositor reaching to apical fourth of sixth segment ; thorax metallic 



bronzy-green, witliout pale marking 4. sumichrasti Cresson. 



Occipital carina behind ocelli angulate forward ; third, fourth, and fifth 

 abdominal segments shorter than second or sixth ; the apical margins of 

 fifth and sixth with (rather feeble) band of silvei-y hair; ovipositor 

 reaching to near base of sixth; thorax brownish black, the anterior and 

 posterior margins of pronotum, sides and posterior margin of mesothorax 

 yellow 5. tolteca Cresson. 



8. Ovipositor reflexed, reaching forward more than one-half length of abdou^.en, 



but not to its base 9 



Ovipositor reflexed, reaching forward beyond base of abdomen 10 



9. Propodeum with high angular median carina ; hind coxa witliout spur on 



upper margin ; pronotum reddish with dark spots, female 8.6 mm. 



6. robertsoni Crawford. 



10. Hind coxa witliout spur on upper margin, its surface mostly smootli and 



polished; propodeum densely hairy throughout; thorax strongly greenish 

 iridescent, without yellow markings, female 10 mm. 



7. cayennensis Westwood. 



Hind coxa, with spur on upper hind margin, its outer surface entirely 



punctate 11 



11. Propodeum longer than metanotum in median line; hairy only at sides, hind 



femur fully twice as long as broad ; pronotum red except for yellow band 



near hind margin, female 10.8 mm 8. opalescens, new species. 



Propodeum about equal to metanotum in median line; hind fenmr scarcely 

 twice as long as broad 12 



