26 E. T. CRESSON. 



small, ovate, depressed eyes, the distance from the eyes to posterior marfjin of 

 head more than half that between the eyes themselves ; posterior margin broadly 

 not deeply concave, and that of cheeks acutely carinate and ending beneath in 

 a prominent acute tooth; antennre long, slender; thorax rather small, liddle- 

 shaped, the sides anteriorly — when viewed from above — acutely angular; meta- 

 thorax short, rounded above, truncate behind, the lateral maj'gin subcrenulate, 

 flanks depressed, finely, transversely wrinkled ; til)i8e strongly spined, tarsi long, 

 slender; abdomen with first segment transversely rounded when viewed from 

 above, depressed, subsessile with base of second segment; second ventral seg- 

 ment subconvex, sparsely punctured. 



Black, the pubescence black, with short and long scattered erect hair ; an ill- 

 defined oblique spot behind each eye, more distinct when viewed in front, 

 the cheeks in certain lights, two spots on mesothorax and also on metathorax, 

 both subconfluent, and lower margin of flanks, all golden pubescent; tubercles 

 at insertion of antennse, and mandibles except tips, ferruginous; scape and base 

 of flagellum fuscous, sericeous with golden pubescence ; sides of thorax and legs 

 brown, the latter with long, pale pubescence ; calcaria pale fuscous ; first ab- 

 dominal segment, and venter brown, with pale pubescence; second segment with 

 a large rounded central spot of dense appressed orange-golden pubescence ; apical 

 margin of segments 2 and 3 and sides of 6 fringed with pale golden pubescence. 



St. Catherina. The ornamentation of second abdominal segment 

 above is much like that of cep ha lotes, which it closely resembles (al- 

 though only half the size), but without the lateral silvery stripes. 



27. M. spiniceps 9- — Length 15 mm. — Coarsely, con fluently punctured; 

 head large, quadrate, broader than thorax, deeply emarginate posteriorly, the 

 sides behind eyes rounded and narrowed to the acute posterior angles; two short 

 tubercles between insertion of antennae; posterior angles of occiput with a strong 

 sharp carina, forming an acute tooth when viewed from above; head beneath 

 with two long, subacute, slightly divergent, distant teeth, behind each of which 

 is a somewhat hooked tooth on lower posterior angles of the liead ; eyes ovate, 

 distinctly netted; thorax short, fiddle-shaped, a short stout tubercle on each side 

 just behind the prothorax ; metathorax short, rounded above, abruptly declivous 

 behind, posterior disk flattened ; flanks of thorax excavated, smooth and polished ; 

 abdomen ovate, about as long as head and thorax together; first segment sub- 

 nodose, dilated posteriorly, subeonstricted and depressed at apex, the anterior face 

 of the segment being broadly flattened, and almost smooth; pygidium ovate, 

 feebly punctured, sides acutely margined ; venter shining, deeply and sparsely 

 punctured. 



Head and thorax entirely deep black; clypeus with long white hair; flanks 

 of thorax with silvery sericeous pile ; legs piceous, with long, rather sparse 

 whitish hair, coxae silvery sericeous, calcaria honey-yellow; abdomen black, 

 narrow apical margin of the segments and also the pygidium, dark ferruginous, 

 second segment above with an elongate ovate discal spot of golden pubescence, 

 and the third segment with a transverse golden spot on each side of the mid- 

 dle ; apical margin of the segments beneath fringed with long pale pubescence. 



Santarem. One specimen. 



