ICHNEUMON. 153 



latter involute, the joints thick, a little longer than broad ; third joint a very little 

 longer than the fourth. The bases of the joints of the black posterior tarsi are dull 

 testaceous, or sometimes entirely testaceous. Areolet 5-angled, broad above. 



This species is closely related to /. maculipleuralis, but is a smaller and less robust 

 insect, the petiole is smaller, and the gastrocoeli are smaller and not striated round the 

 edges ; the punctuation of the abdomen is stronger, and its apex is more acute ; the 

 terebra and cerci are longer, and the posterior tibiae are black at the apex. 



36. Ichneumon curtituberculatus. (Tab. VII. fig. 11.) 



Ferruginous ; apice antennarum abdominisque segmentis 3° et 4° basi nigris, flagello antennarum medio fiavo j 



alis flavo-hyalinis, nervis et stigmate flavis. $ . 

 Long. 11 millim. 



Hab. Mexico, Guadalupe (Bilimelc). 



Head and thorax strongly, the abdomen very finely and closely, punctured. Scutellum 

 raised a little above the mesonotum, carinate at the base, longer than broad, narrowed 

 towards the apex. Metathoracic areae all well marked ; supramedian area longer than 

 broad, the middle angled, projecting a little, scabrous. The base of the metanotum is 

 bordered with black, and the apex of the pronotum is yellow. Petiole smooth and 

 shining, bicarinate at the sides ; postpetiole broad, finely and longitudinally striated. 



Comes very near /. tumidulus, but that species may be known from L cnrtituberculatus 

 by its scutellum being broader than long, flatter, not so strongly punctured, and yellowish 

 in colour ; the supramedian area longer, narrower, and with the sides quite parallel ; 

 the abdomen longer and more sharply pointed at the apex ; and the apices of the hind 

 tibiae broadly black. 



37. Ichneumon maculipleuralis. 



Ferrugineus ; thorace et abdomine nigro lineatis ; alis flavo-hyalinis, nervis fuscis, stigmate testaceo. $ . 

 Long. 17 millim. 



Hab. Mexico (Salle). 



Head subbuccate, excavated above the antennae, the excavated part black, smooth, and 

 shining. Vertex shagreened ; face more shining, bearing shallow scattered punctures, 

 and sparsely covered with white hair. Eyes surrounded by a furrow all round, the 

 head projecting behind them ; vertex, and sides above, covered with a fuscous pile. 

 Thorax covered with shallow punctures, almost shining. Metapleurae striated, the suture 

 crenulated. Scutellum flatly convex, broadly rounded behind and before; the apex 

 rounded, narrower than the base, and covered with shallow scattered punctures ; a deep 

 furrow at its base ; postscutellum separated from it by a suture. Metathorax closely 

 punctured, large, the disc with a gentle slope, the apex subvertical, retreating in the 

 centre ; the metathoracic areae obsolete, the lateral keels only being faintly indicated. 

 Petiole smooth, shining, the sides keeled at the top and bottom : the keels do not 



biol. CENTK.-AMEE., Hymenopt, April 1885. xx 



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