MONOMA. )'.'>! 



calipennis and is distinguished from it by the two spines of the 

 metathorax, by the post-scutel witliout any crest, by its wings 

 of which the extremity has but very little while, etc. 



Hab. The hot regions of Mexico. I have taken a specimen 

 near Tarnpico. 



b. Metathorax without distinct spin/form angles. 



9. M. apicalipciiiiis Sauss. — Nigra, capite et tborace densissime 

 punctatis ; abdomine ovato, veiutino, tenuiter punctato, segmentorum 

 margiue paulo distinctius et densius punctato; capite satis minato ; 

 clypeo truncate-, subbidentato ; thorace antice paulo coarctato, biangu- 

 lato ; post-scutello paulum transversim cristate, postice truncate ; 

 metanoto laevi, truncate, lato, rugoso, in medio foveota lsevi instructo, 

 sed ubique rotundato, canthis nullis, et nullomodo bidentato; clypeo, 

 mandibulis, spatio post-oculari, antennarum scapo subtus, tibiis anticis 

 antice, tarsis anticis apice unguibusque, rufis ; alis nigris, apice albidis. 

 f . Longit, 16 mm. 



Monobia apicalipennis Sauss. Vespid., I, 98, 5 ; pi. xv, fig. 6 (III, 163, var.?) 



TIab. South America. (Typus in actoris museo.) 



This species differs' from the M. nigripennis, by its strongly 



angulate prothorax and by its rounded metathorax. 



(I found in Mexico one of the Apidse which could very easily 



be confounded with this Monobia.) 



C. Abdomen slightly fusiform, enlarging as far as the extremity 

 of the 2d segment; the 1st segment a little funnel-shaped, 

 divided by a feeble longitudinal groove. Thorax lengthened. 



These insects have the appearance of Montezumia and one 

 would readily confound that with those of this genus, were it not 

 for the rudiment of the 4th article of the labial palpi. They form 

 the transition from Montezumia, and one can almost class these 

 with that genus from the formation of their body; however, the 

 structure of their palpi, their sessile abdomen having the first 

 segment in form of a bell rather than funnel-shaped and above all 

 their metathorax excavated and bidentate, assigns them their 

 place among the Monobia. 



10. WT • TariaMlis n. sp. — Ferruginea, dense punotata ; clypeo subbi- 

 dentato; metanoto ferruginoso, foveola striata et utrinqne dente instructo ; 

 abdomine basi angnstiore, segmento prirao Bavo-limbato ; rap; 

 mesonoto uigro-variis ; alis obscuris, violasoentibus. 



Total Length, IS nun.; wing. 15 mm. 







