190 • HYMENOPTEEA. 



1. Trogus latipennis. 



Trogus latipennis, Cresson, Proc. Acad. Phil. 1873/ p. 132 (?) l . 

 Hab. Mexico, Orizaba 1 (Sumichrast). 



2. Trogus excellens. 



Caerulea; facie (medio excepto), ore, palpis, tibiis tarsisque anticis, flavis ; alis nigro-violaceis. c? • 

 Long. 17 millim. 



Hab. Guatemala, Purula (Champion). 



Head and thorax closely and rather strongly punctured ; the middle of the meso- 

 pleura more shining and less closely punctured ; the base of • the metanotum smooth, 

 shining, and impunctate. Petiole punctured, the postpetiole more strongly and closely: 

 a furrow runs through the middle of the latter, the furrow keeled on either side. The 

 rest of the abdomen strongly and coarsely punctured, the punctures running into 

 reticulations on the second and third segments ; the apical segments are not so strongly 

 punctured, and the punctures are wider apart. Arese of the metanotum all present, 

 except the upper median. Scutellum raised into a blunt peak. Gastrocceli large, 

 deep, shining in the centre ; the space between the two longitudinally striated. The 

 entire face (except a black line which runs down from the antennae to the clypeus), the 

 inner orbits of the eye, and the mandibles and palpi, bright yellow. Wings large ; 

 areolet broad at the bottom, the lateral nervures curved and meeting above. The 

 abdominal segments are not much constricted at the base. 



3. Trogus ornaticornis. (Tab. IX. fig. 2.) 



Caerulea ; antennarum articulis 2°-10 m flavo-albidis, tibiis anticis sordide albis, alis violaceis. tf . 

 Long. 17 millim. 



Hab. Guatemala, Purula (Champion). 



Body closely punctured all over ; mesopleura transversely and coarsely striated. 

 Front deeply excavated immediately above and below the antennae; the excavation 

 smooth, shining, and impunctate; eyes projecting, the head retreating behind them; 

 head not buccate. Scutellum not very much elevated above the scutum, shining, 

 covered with scattered punctures, the upper part bluntly rounded, and with a deep 

 depression at the base ; postscutellum smooth, shining, impunctate, and with a deep 

 wide transverse suture at its apex. The centre of the metanotum is broadly raised, 

 and more shining and less punctured than the rest ; the apex with a rather abrupt 

 slope ; coarsely 'punctured ; the central and lateral keels well developed. Basal half 

 of the petiole depressed in the centre, shining, faintly striated ; the rest punctured 

 like the other abdominal segments ; the petiole at the base with a keel on both sides, 

 which is prolonged into the end along the middle of the thicker apical portion. 

 Abdominal segments convex above, strongly constricted at the base. Gastrocceli deep, 



