Monographie der Bienengattung Coitris (s. lat.). JOI 



except its lateral base, black; labrum forming a very large, flattened plate, passing be- 

 neath the mandibles, black, polished, with a broad, pale yellowish-white stripe on each 

 side, converging towards the tip, which is truncate, somewhat reflexed and armed above 

 with a long, slender, porrect, subacute spine; the cheehs much produced beneath the 

 base of the mandibles, forming an obtuse process, against which the sides of the labrum 

 seem to rest; mandibles very long, narrow and cleft at tip, shining black, fringed be- 

 neath with a row of scattered, black pubescence; antennae black, the flagellum beneath 

 piceous. Thorax robust, clothed with short, dense, pale ochraceous pubescence, sparse 

 on the pleura beneath; mesothorax with a large space of dense black pubescence cover- 

 ing nearly its entire surface; sides of the scutellum with a tuft of long blackish pube- 

 scence; metathorax naked, smooth and shining on the middle, and clothed on each side 

 with long, dense, ochraceous pubescence; tegulae piceous, highly polished. Wings 

 faintly tinged with pale fuscous, with a slight metallic gloss; nervures fuscous. Legs 

 piceous-black, clothed with black pubescence, mixed with pale on the femora beneath; 

 posterior tibiae and basal Joint of their tarsi flattened and dilated, densely clothed on 

 the outside with short pubescence, that on the tibiae ochraceous, and that on the tarsi 

 black; spurs of the posterior tibiae long and acute, the inner one pectinated, the pecti- 

 nations gradually longer towards the base; tarsal claws bidentate. Abdomen narrower 

 than the thorax, oblong-ovate, convex, polished, black, sparsely punctured, clothed with 

 a short, pale ochraceous pubescence, very thin and short on the second and third Seg- 

 ments, more dense on the apical segments, and long on the basal segment, the anterior 

 face of which is deeply excavated; beneath shining, sparsely pubescent. Length 7 lines 

 (= 15 mm.). 



»Coli. Gundlach, i 5. 



»This Singular species in remarkable for the curiously constructed head, which 

 differs froni that of any other Hymenopterous insect known to me. The structure of 

 the antennae and legs, and the neuration of rhe wings, coincide with that of Centris; 

 but the shape of the head, and of the clypeus, labrum and mandibles, is so very different, 

 that the species will doubtless form a new genus, for which I would propose the name 

 of Gundlachia, which may be more fully determined when more specimens have been 

 discovered, and when the parts of the mouth can be examined.« 



95. Centris breviceps Friese. 



?i84i. Centris vittata Lepeletier, cf $, Hist. nat. Insect. Hymen., II, pag. 168. 

 iSgg. Centris breviceps Friese, cf $, Termesz. Füz., XXIII, pag. 44. 



Nigra, cinereo-hirta, abdomine rufo, ut difformis $, sed clypeo concavo, flavo- 

 fasciato, 4-gibboso; labro flavo, longitudine multo latiore; mandibulis apice 4-dentatis, 

 basi inermi; thorace cinereo-piloso, pilis singularibus apice nigris; abdomine rufo, seg- 

 mento i. cinereo-hirto, segmentis 5.-6. rufo-setosis, valvula anali nigra; pedibus nigris, 

 tibiis posticis rufis, ferrugineo-hirsutis; d" pedibus posticis incrassatis, trochanteribus 

 fere dentatis, tibiarum apice dentato, metatarsis dilatatis, lateribus sinuatis. 



Centris breviceps gleicht äusserlich vollkommen der difformis, doch ist die Kopf- 

 bildung ganz anders; Clypeus concav, Labrum viel breiter als lang, Mandibelbasis ohne 

 den mächtigen Zahn. 



9. Schwarz, grau behaart; Kopf kurz, Scheitel schwarz behaart, die übrigen 

 grauen Haare wie auch diejenigen des Thorax mit schwarzen Spitzen; Clypeus kahl, 

 ausgehöhlt, mit gelber Querbinde, an der Basis und am Endrande jederseits mit höcker- 



