NO. 2242. MORPHOLOGY OF THE STREPSIPTERA— PIERCE. 481 



but the difference between the Hawaiian specimens and the examples I refer 

 to the latter from Europe, America, Fiji, and Australia is much greater than 

 any distinction between the individuals of E. tenidcornis from the above named, 

 widely separated regions. 



. 45. Genus DEINELENCHUS Perkins. 



1. D. australenis Perkins; paratype of Platybrachys, species; 

 Queensland. 



46. Genus LIBURNELENCHUS, new name. 



Mecynocera Pierce, 1908, not J. C. Thompson in Crustacea, 1888. 



1. L. koeielei Pierce; parasite of Liburnia campestris Van Diizee 

 and L. lutulenta Van Duzee; Ohio. 



2. L. heidemanni, new species; parasite of Liburnia, species; 

 Maryland. 



1. LIBURNELENCHUS KOEBELEI Pierce. 



Mecynocera koebelei Piekce, in all previous worlds. 

 Errata : Gen. Insect., p. 44, line 43, add " PI. 3, unnumbered figure." 



2. LIBURNELENCHUS HEIDEMANNI, new species. 



Plate 78, figs. 8. 9. 



Described from a specimen extracted from a Liburnia collected 

 at Bay Ridge, Maryland, September 1, 1902, by the late Otto Heide- 

 mann, and named in his honor. 



The thorax is in general as in L. koebelei, but the oedeagus differs 

 greatly, as shown in the illustrations. 



Type.— Cat. No. 21457, U.S.N.M. 



47. Genus ELENCHINUS, new genus. 



Male. — Elongate, with slender enlongate antennae, the last joint 

 of which would reach beyond the postlumbium. Mandibles stout, 

 acute, over half as long as breadth between eyes; maxillae 2- jointed, 

 the second joint longer than first. Metapraescutum, broad at base, 

 acute at apex, not reaching the transverse scutellum. Scuti not reach- 

 ing humeri, united behind praescutum. Parascutellum at sides of 

 scutellum and diagonal. Scutellum truncate in front, with anterior 

 angles diagonally truncate, posterior angles pedunculate, and base 

 bisunuate. Postlumbium semilunar, membranous. Postscutellum 

 elongate. Elytra very long, slender, clavate. 



T^pe of the genus. — Elenchinus heidemanni, new species, from 

 Megamelanus species; Maryland. 



1. ELENCHINUS HEIDEMANNI. new species. 



Plate 78, figs. 10-12. 



Described from one male extracted from a Megamelanus, species 

 collected at Bay Ridge, Maryland, September 1, 1902, by the late Otto 

 Heidemann, in whose honor the species is named. 

 3843— 19— Proc.N.M.vol.54 32 



