288 HYMENOPTEKA. 



the joints produced at the base and apex on the lower side. Head broad ; not deve- 

 loped much behind the eyes, which are large and margined ; the front slightly hollowed 

 above the antennae, the face projecting beyond it, especially in the middle ; clypeus 

 almost transverse, clearly defined behind by a furrow ; face strongly, the vertex and 

 front more finely, punctured. Thorax shining, bearing clearly separated punctures ;: 

 scutellum obsoletely, the pleurae and metathorax strongly, punctured. Scutellum 

 broader than long, becoming narrower towards the apex; flattish, but raised in the 

 centre. The metanotum has eight areae, and is hollowed in the centre ; there are two 

 large yellow marks on each side of the hinder median area, and a small one close to the 

 stigma ; the sides and apex covered with white hair. The petiole becomes gradually 

 thickened towards the apex ; the sides are keeled and the centre raised, the raised part 

 bounded by a not very distinct furrow ; the gastrocoeli at the base of the second segment 

 are curved, moderately wide and deep, and finely punctured. The abdominal segments 

 are clearly separated ; strongly punctured, and covered (especially laterally and at the 

 apex) with white hair. Legs stout ; hind coxae large, thick, hollowed posteriorly. The 

 four anterior legs are fulvous ; the hind coxae reddish, black at the base beneath ; the 

 trochanters are black at the base ; the femora are mostly reddish beneath, and the hind 

 tibiae are red, broadly black at the apex. Wings short ; the areolet oblique, the lateral 

 nervures converging towards the top, the lower part produced into an angle which 

 receives the recurrent nervure close to the middle. 



Subfam. OPHIONIN^l. 



Although this subfamily contains some of the most conspicuous species of Ichneu- 

 monidae, yet the number of species hitherto found in our region is comparatively small. 



THYREODON. 



Thyreodon, Brulle, Hist. Nat. Ins. Hymen, iv. p. 150. 



Species of this genus have been recorded from Asia, but I believe it will be found 

 that Thyreodon is strictly a New World genus. 



—- l. Thyreodon niger. (Tab. XII. fig. 12*.) 



Thyreodon niger, Cresson, Proc. Acad. Phil. 1873, p. 375 (<$ ? ) \ 



Hah. Mexico, Cordova 1 (Sumichrast) ; Guatemala, Cubilguitz in Vera Paz (Cham- 

 pion). 



2. Thyreodon erythrocera. (Tab. xn. fig. 13.) 



Hab. Mexico, Valladolid in Yucatan (Gaumer). 



This species has the deep black body, wings, and reddish antennae (black at the base 

 * The name of the genus is erroneously given as " Thyredon" on the Plate. 



