April, '04] ENTOMOLOGICAL NEWS. II5 



side or clasping pieces. It is curved ; at the lower end it is tapered and 

 has a long, slender, downwardly projecting piece, notched at the lower 

 end, which probably serves as a prop. The upper part is modified into a 

 clasp, with three peculiar hook or grasping pieces for holding the anus ; 

 the lower two are longest and are curved downward and upward forming 

 a cup ; the upper piece extends upward and has on its dorsal-cephalic 

 part a small hook, curving cephalad. The structure which holds the 

 penis is also peculiar aud consists of two pieces ; one long, slender and 

 funnel-shaped and large at the lower end ; and the other broad and leaf- 

 like, joining to the middle of the other piece ; a funnel-shaped depression 

 is thus formed for the reception of the penis. 



Habitat : — Mt. Wilson, Sierra Madre Mountains, Los Angeles 

 County, Califortia. Altitude, 5886 feet. Discovered June 6, 

 1903, flying very rapidl}' around the Ceonothiis and scrub-oak 

 shrubs on the summit, in the hot sunshine. 



Types, four males and one female, to be deposited in the 

 collection of the California Academy of Sciences. The mark- 

 ings of the female are peculiar 

 and characteristic and will ser\'e 

 to distinguish the species at a 

 glance ; while the abdominal ap- 

 pendages of the male are pecu- 

 liar and characteristic in struc- 

 ture. 



The figures have been drawn 

 by the author from the appen- 

 dages of a male mounted in glycerine jelly on a slide, and 

 preserved with the t3'pe. Fig i represents the side or clasp- 

 ing organ ; Fig. 2, the structure which holds the anal open- 

 ing ; Fig. 3, the structure which holds the penis. 



The manuscript of a Catalogue of North American Diptera by Prof. 

 J. M. Aldrich has been accepted for publication by the Smithsonian. 

 The contract has been let for the printing, and he expects proofs almost any 

 time. It will appear in the series called ''Smithsonian Miscellaneous 

 Collections," the same which includes both first and second editions of 

 Osten Sacken's catalogue. 



There will be about 7000 species of Diptera recorded from North 

 America in the new catalogue, and about 32,000 bibliographical referen- 

 ces. It win make at least 750 pages printed. There are about 900 titles 

 in the bibliography, which includes economic and morphological papers. 



