984 CHARLES PAUL ALEXANDER 



transversely wrinkled. Metanotum (Plate LXXXVI, 470) near anterior margin with a trans- 

 verse row of setiierous punctures, there being four on either side, the intermediate ones with 

 two setae. Wing sheaths reaching base of third abdominal segment. Leg sheaths reaching 

 beyond midlength of fourth abdominal segment, fore legs a little the longest, hind legs 

 a little the shortest. 



First abdominal segment on dorsum somewhat similar to metanotum, with a transverse 

 row of four punctures at about midlength, the lateral ones with two setae; remaining 

 abdominal segments (Plate LXXXVI, 471) subdivided into approximately equal basal and 

 posterior rings; on tergites, posterior ring with a transverse row of spines, basal ring unarmed; 

 on sixth tergite, where best developed, spines on posterior ring numbering about twelve, with 

 a seta at each end of the row and two others interspersed; on anterior tergites, spines very 

 email; on seventh tergite spines large, elongated; on eighth tergite four powerful spines in 

 transverse alinement; on pleurites, a strong spine on each ring, that of basal ring deeply 

 bifid and with a strong seta in notch thus formed; posterior ring with a single spine bearing 

 a long seta on its face; on sternites, condition generally similar to that on tergites, the spines 

 a little more prominent but of about the same number, these spines slender at their slightly 

 curved tips and lacking on sternites 2 to 4. Female cauda (Plate LXXXVI, 472 and 473) 

 with acidothecae elongate, contiguous, on either side of tergites at base with a powerful 

 incurved hook; posterior margin of eighth tergite with four spines, lateral pair a little the 

 larger; ventral side at base with a median protuberance bearing two powerful lateral lobes 

 and two smaller chitinized spines which are directed caudad and ventrad; base of segment 

 8 with. a crossrow of eight spines; posterior ring of segment 8 with a powerful spine at 

 lateral end. 



Nepionotype. South Mountains, near Myersville, Maryland, March 31, 1916. 

 Neanotype. Hagerstown, Maryland, May 9, 1916; cast pupal skin in collection of 

 United States National Museum. 



Paratypes. Larvae from type locality. 



Genus Brachypremna Osten Sacken (Gr. short + trunk) 

 1886 Brachypremna 0. S. Berl. Ent. Ztschr., vol. 30, p. 161. 



Larva. Unknown. 



Pupa. Antennal segments enlarged at base. Antenna short. Sheaths of maxillary 

 palpi short, not recurved at tips. Pronotal breathing horns short, slender, finely annulated. 

 Mesonotum with eight prominent tubercles. Leg sheaths reaching beyond midlength of 

 fourth abdominal segment, fore tarsi very short, other tarsi subequal in length. Abdominal 

 segments each with four slender spines on posterior ring of both sternites and tergites, just 

 before posterior margin; two pleural spines; eighth segment of male with four prominent, 

 spinous lobes. 



Brachypremna is a small genus, including but nine recent species found 

 in the Austral and Tropical regions of the New World. Brachypremna 

 eocenica Meunier is described from the Baltic amber. The flies of the 

 best-known species, B. dispellens, are known in parts of the Southern 



