44 Psyche [April 



scattered strong punctures; very broad anterolateral areas of clypeus yellow, as 

 also are the lateral face-marks, which are triangular, the upper edge nearly straight, 

 but with a linear process extending a short way up orbital margin; labrum pale 

 yellow, broad, but with a median apical spine, which is dark reddish; no supra- 

 clypeal mark; malar space dark reddish; mandibles strongly curved, very broadly 

 yellow basally, apically broadly red on outer side, teeth four, two apical, one about 

 twice as long as the other (inner one), one broadly truncate and subemarginate on 

 the inner side near the middle, and a short angular one at the base of that; lower 

 part of sides of prothorax red; truncation of meta thorax with a large whitish patch 

 on each side; tegulse light ferruginous; wings strongly dusky, marginal cell smoky, 

 strongly appendiculate, the area above the appendicular nervure fuliginous; ante- 

 rior and middle tibiae with a yellow spot at base, and indications of a stripe on ante- 

 rior pair; hair of legs bright ferruginous, cream-colored on anterior legs behind; 

 scopa of hind tibiae and basitarsus very large, strongly plumose, a very fine coppery 

 red; abdomen with the first three segments black above, the hind margins of sec- 

 ond and third dark red, the remaining segments red, the fourth dark basally; first 

 segment with pale fulvous hair; second and third with very short inconspicuous 

 black hair, the others with red hair; venter ferruginous; apical plate truncate. 



Hah. — Porto Velho, Rio Madeira, Brazil {Mann & Baker). A 

 very fine species, not close to any known to me. It is placed in 

 Ptiloiopus, but in spite of its lack of metallic color, it is doubtless 

 allied to the species of Hemisia. In Friese's table of Melanocen- 

 tris (Ptiloto'pus) it runs to 22, and except for its rather smaller size, 

 on to the vicinity of fnscata or fusciventris, which it does not re- 

 semble. In the table of species with red abdomen it cannot be 

 made to fit anywhere. It cannot be run to anything in Schrottky's 

 tables of Brazilian or Paraguayan species. 



Centris {Pliloiopus) libertatis sp. nov. 



Female. Length about 11| mm.; black, the head and thorax with fulvous pub- 

 escence, becoming white beneath, fuscous on vertex; clypeus much broader than 

 long, rugose, with a longitudinal keel, a median triangular area black, the apex of 

 the triangle downwards, the lateral areas, almost meeting below, yellow; a nar- 

 rowly crescentic supraclypeal mark, lateral face-marks filling space between cly- 

 peus and orbit and sending a narrow band up orbital margin beyond level of an- 

 tennae, labrum entirely, and more than basal half of mandibles, all lemon-yellow; 

 mandibles rather slender, not dentate; eyes yellowish-green; antennae short, black, 

 first joint of flagellum elongated; mesothorax and scutellum densely punctured; 

 a slender hairless line along hinder middle of mesothorax, but no other bare space; 

 tegulse closely and minutely pimctured, ferruginous, with broad whitish margin; 

 wings strongly infuscated, nervures piceous, very heavy; the three submarginal 

 cells about equally long below, the second broader than high, little produced at 

 upper apical corner, receiving first r. n. about middle; marginal cell short, with a ful- 



