30 NEOTROPICAL BEES 



Tlahualilo, Durango, Mexico, at flowers of squash, Sept. 2, 

 1904 (A. W. Morrill). Also one from Mexico (Baker coll. 

 2320). The first mentioned is the type. The black hair of the 

 head readily distinguishes this from M. atrata Smith, which is 

 otherwise very similar. 

 Melissodes albocollaris new species 



Male. Length, about 13 mm.; very robust; black, including tegument of 

 clypeus and labrum; mandibles with an orange band on apical part; antennae 

 reaching to base of abdomen, flagellum very bright ferruginous beneath; third 

 antennal joint much longer than broad; eyes greenish, prominent; facial 

 quadrangle distinctly longer than broad; vertex shining; mesothorax and 

 scutellum polished, with coarse punctures; spurs ferruginous; tegulae black, 

 with pale hair; wings dilute fuliginous; second submarginal cell very broad, 

 receiving first recurrent nervure well beyond middle; hair of head white or 

 pale ochreous, but black on vertex and occiput; hair of thorax black, but 

 creamy white on upper margin of prothorax, tubercles, broad anterior border 

 of mesothorax and long fringe along posterior margin of scutellum; abdomen 

 with thin black hair, but with some inconspicuous pale hair at sides, more 

 abundant and forming large thin patches on segments four and five; venter 

 with black hair. 



Mexico (Baker coll. 2154). Related to M. atrifera Cockcrell, 

 but very rol)ust, with hair of pleura and metathorax black. 



Melissodes atramentata new species 



Female. Length, about 14.5 mm., anterior wing, 10.2 mm.; robust, black, 

 with black (very dark chocolate) hair all over body and legs, except that there 

 is a small inconspicuous patch of white hair on each side of face, close to eyes; 

 eyes brown; facial quadrangle broader than long; ch^peus rugulose, with scat- 

 tered punctures, and a very strong median keel, not reaching loAver margin; 

 mandibles with an orange mark near apex; ocelli in a line; mesothorax shin- 

 ing on disc posteriorly; tegulae piceous; wings fuliginous, not violaceous; 

 first recurrent nervure meeting second transversocubital; second submarginal 

 cell quadrate, a little broader above than below; abdomen finely punctured, 

 thinly hairy; at each extreme side of ventral segments three to five is a very 

 long tuft of black hair. 



Colombia (Baker coll.). Possibly the female of M. aethiops 

 Smith, of which onh' the male is known, but apparently distinct 

 by the uniformily dusky wings. The dark wings also separate 

 it from M. melaena Spinola and M. corvina Friese. Tetralonia 

 mephistophelica Schrottky, known only in the male, is too large, 

 and has the wings with l)luish or violet reflections. There is a 

 close general resemblance to the North American M. caliginosa 



