476 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [Vol.Y. 



flexed edge broader and the anterior border scarcely angulated. Legs 

 stout, but not unusually long ; enclosure at base of posterior tibi£e not 

 defined 5 pul villus of the usual size ; tooth of the claws of the four poste- 

 rior tarsi considerably shorter than the blunt claw. Pubescence on the 

 posterior legs dense, and as long as in Syllonia $ . Upper surface as well 

 as the under surface of the abdomen with long and dense pubescence. 



DIADASIA ENAVATA. 



Melissodes enavata Cress., Trans. Am. Ent. Soc. iv, p. 280, $. 

 Melissodes ? nrsina Cress., Trans. Aui. Ent. Soc. iv, p. 281, $ . 

 Melissodes f densa Cress., Trans. Am. Ent. Soc. iv, j). 282, $ . 



DiADASiA AUSTRALIS. 



Melissodes australis Cress., Proc. Acad. Nat. Sci. Phila. 1878, p. 214, $ $ . 

 DiADASiA DIMINUTA. 



Melissodes diminuta Cress., Proc. Acad. Nat. Sci. Phila. 1878, p. 215, ^ . 



Emphor n. g. (^v + ^cop). 



Type: Emphor bomiiformis. 



Melissodes homViformis Cress., Proc. Acad. Nat. Sci. Phila. 1878, p. 219, <? 9. 



^, Clypeus little elevated; ocelli in a curved line; labrum trans- 

 verse quadrate, the sides slightly rounded out, the anterior border form- 

 ing a slightly elevated ridge, the edge deflexed to form a distinct face 

 at right angles to the upper face, the corners not angulated. Mandibles 

 arising close to the eyes, unarmed, suddenly curved near the base. 

 Proboscis not lengthened; maxillary palpi flattened, the apical joints 

 more slender, the first, fourth, fifth, and sixth joints subequal, the second 

 cind third each twice as long as each of the others, the second joint 

 with a fringe of hairs beneath near the tip ; the two basal joints of the 

 labial palpi equal in length. Antennae reaching to the tegulse. Posterior 

 legs unusually long, the femora swollen, enclosure at base of tibiae not 

 defined, pulvillus unusually small, being minute. The pubescence of the 

 legs short. Anterior wings with the stigma narrow and elongate ; the 

 marginal cell lanceolate, with a distinct straight appendiculation ; sec- 

 ond submarginal cell pentagonal, narrowed towards the marginal, not 

 l)ointed at the base, but the sides symmetrical, the recurrent nervure 

 received in the middle ; third submarginal cell longer than broad, nar- 

 rowed nearly one-half towards the marginal ; limb of the wing coarsely 

 punctured; externo-medial nervure very abruptly bent; anal lobe of 

 the posterior wings extending beyond the middle, but not to the apex, of 

 the submedial cell. Lateral impressed lines of the abdominal segments 

 indistinct; no area on the aiiical segment; ijubescence of the abdomen 

 short and velvety. 



EnTECHNIA n. g. (^iTsp^vta). 

 Type: Entechnia taurea. 



Anthophora taurea Say, Bost. Jour. Nat. Hist, i, p. 410, $ J. 



5 , Clypeus elevated ; ocelli in a curved line ; labrum quadrate, the 

 anterior margin slightly rounded out and roughened, both the lateral 



