266 The Ohio Journal of Science [Vol. XVIII, No. 7, 



8. Thorax black or dark brown 9 



Thorax red, metathorax black 14. erythrodes 



9. Head ferruginous 10 



Head black 11 



10. Pronotum with transverse impression 2. affinis 



Pronotum without transverse impression 1. peculiaris 



11. Head deeply concave 12. obscurissimus 



Head slightly concave 1.3. inimicis 



12. Head and thorax yellow, mandible 4-dentate 4. bicolor 



Head in greatest part and thorax black or dark brown 13 



13. Head finely hairy, mandible 3-dentate » o. californicus 



Head not hairy 14 



14. Abdomen flecked with reddish brown 6. flavifrons 



Abdomen black 15 



15. Head finely rugulose, behind black 3. cyphonotus 



Head very finely punctate, behind yellow or red 10. ombrodes 



1. G. peculiaris Brues. 



Trans. Amer. Ent. Soc. v. 29, p. 125 (9 ), 1903. 



Female: Polished black, except greater part of head, sutures of 

 legs and base of antennae, which are reddish or yellow. Pronotum 

 smooth, shining, lacking the transverse impression. Length, 2.75-3 mm. 



Austin, Texas. Collected. 



2. G. aflSnis n. sp. 



Female: Differs from above chiefly in possessing the emargination 

 on the pronotum. Dark brown to black, scape of antennas white, 

 mandibles and frons below antennas testaceous, thoracic constriction, 

 central area of hind node just before spiracles, and extreme posterior 

 portion of propodeum yellow to testaceous. Legs ferruginous. Pro- 

 notum shining with minute punctures, thoracic constriction reticulately 

 sculptured, hind thoracic node minutely reticulately rugose anteriorly 

 and posteriorly, but smooth in middle. Abdomen polished, both abdo- 

 men and thorax with short scattered hairs. Length, 3.5 mm. 



Male: Black, pubescent, vertex angulate, antennae?* head triangular 

 w^hen viewed from side : vertex minutely and densely punctate ; occiput 

 deeply emarginate and excavated. Three ocelli visible from above, the 

 anterior being below the vertex and twice its diameter distant from the 

 lateral ones which are nearer to the eyes than to each other. Eyes 

 nearly spherical, pubescent. Antennae of medium length, pubescent. 

 Mandibles white, teeth brown; maxillary palpi white, two joints 

 visible. Prothorax scarcely visible from above attaining the tegulas on 

 the sides; mesonotum broad, with white pubescence very finely retic- 

 ulately punctate; parapsidal ftirrows distinct, converging and meeting 

 posterior margin of mesothorax but a small distance apart; scutellum 

 much smaller than mesonotum, smooth and shining; propodeum 

 minutely reticulately punctate. Wings hyaline, ciliated and clothed 

 with fine hairs. Venation pale, pterostigma short and lanceolate. Two 

 basal cells present. Radius pale, curved, the distal part much longer 

 than the proximal, running almost to the margin of the wing, forming a 

 nearly closed cell. Legs long, alternately marked with yellow and 



* 



Specimen imperfectly emerged. 



