114 APID-E. 



white; the pubescence on the face dense and nearly white ; the 

 Hai,n'llum bcuoafh fulvous. The thorax with whitisli pubescence 

 biMu-ath ; the tibiic and tar.si ferruginous, tho claws ])lack ; wings 

 hyaline and iridescent, the nervurcs ferruginous, the tcgulaj rufo- 

 tosl iicoous. Abdomen densely clothed with short pale fulvous pu- 

 bescence above, beneath rufo-piceous, with the margins of the 

 segments palo. 



JIab. Villa Nova, on the Amazon, 



4. Melissodes californica. 



Female. Length 8 lines, — Black ; the thorax with fulvous pubes- 

 cence, the abdomen M-ith pale abdominal fascia). The face with 

 pale fulvous pubescence, that on the checks nearly white; the 

 mandibles pale ferruginous in the middle. The thorax with bright 

 fulvous pubescence above, that beneath paler; on the legs it is 

 fulvous, that on the posterior tibia) and first joint of the tarsi being 

 long and dense and fulvo-ferruginous within ; the apical joints of 

 the tarsi ferruginous, the claws black ; wings subhyalino, the ner- 

 vurcs dark ferruginous. Abdomen with short black pubescence, 

 that on the two apical segments longer and sooty black ; the basal 

 segment with pale fulvous pubescence, the three following seg- 

 ments with palo pubescent fascia) a little before their apical mar- 

 gins ; the second segment has also a fascia at its basal margin. 



Male. A little shorter than the female, which it strongly resembles, 

 but differs in having the clypeus, labrum, and mandibles pale 

 yellow, and also in being of narrower form. 



Eab. California. 



5, Melissodes assimilis. 



Female. Length 6 lines. — Black ; the thorax and posterior tibiae 

 and basal joint of the tarsi with fulvous pubescence. The flagellum 

 of the antennae, except the two basal joints, fulvous beneath ; the 

 mandibles ferruginous a little before the apex ; the face and cheeks 

 with white pubescence. Thorax with . dense fulvous pubescence 

 above ; on the disk of the mesothorax and scutellum it is black ; 

 wings subhyaliue, slightly clouded and iridescent ; nervurcs brown, 

 tegulae rufo-testaceous ; posterior tibiae and basal joint of the tarsi 

 with a dense scopa of pale fulvous pubescence. Abdomen oblong- 

 ovate, shining, with a little thin pale fulvous pubescence at the base ; 

 a fascia of white pubescence at the base of the second segment, 

 and also a broadly interrupted one in the middle ; the third and 

 fourth segments with broad white pubescent fascia) near their basal 

 margins ; the fifth and sixth segments with black pubescence. 



Male. About the size of the female, with the clypeus, labrum, and 

 antennae black, the latter the length of the head and thorax : the 



