1O4 ENTOMOLOGICAL NEWS [Mar., '14 



Abdomen shiny, all of the segments margined with testaceous, seg- 

 ments i and 2 almost impunctate, segments 3 to 5, and sides of seg- 

 ment 2 covered with thin, closely appressed, grayish white hair. 



Pubescence rather scant, whitish on the sides of the thorax and under 

 sides of the abdomen, faintly grayish on the lateral areas of the face, 

 cheeks and legs, darker on the post scutellum. 



Habitat. Mesilla Park, New Mexico, I (type) at flow- 

 ers of Sophia ochroleuca Wooton, March 18 (Cockerell 

 No. 5661) ; Paraje, New Mexico, I at flowers of plum, April 

 II (Ckll.) ; Las Cruces, New Mexico, 2 at flowers of plum, 

 March 23 and 25 (Ckll.) ; Mesilla Park, April 12, I at Sophia 

 (Ckll. 2686f) ; Albuquerque, New Mexico, August 16, I at 

 flowers of Aster spinosus Bentham (Ckll. 4548) ; Bernalillo, 

 New Mexico, July 1-2, i (Ckll. No. 3269). 



Three specimens differ from the type lot by having the meso- 

 notum faintly but distinctly lineolate. Habitat, Colorado 

 Springs, Colorado, 2 on willow, April 20 (W. P. Cockerell) ; 

 Boulder, Colorado, i on Virginia creeper, July 17, 1908 (W. P. 

 Cockerell). 



This species is probably related to H. zephyrus Smith, from 

 which it is distinguished by the wholly nonmetallic abdomen, 

 the blue, not brassy head and thorax, and the longer plicae on 

 the basal area of the metathorax. The punctures of the meso- 

 notum are not crowded around the parapsidal grooves in H. 

 crassiceps as in H. zephyrus. The perfectly hyaline wings, the 

 pale tegulae and the lineolate cheeks as well as the nonmetallic 

 abdomen separates it from H. umbripennis Ellis. 



(To be continued.) 



Bibliography of Diptera. 



II am keeping a card index of the literature of North American 

 Diptera. The number of references has approximately doubled since 

 the publication of my catalogue in 1905, and new matter is now being 

 published in greater volume than ever, especially on the biological 

 phases of the subject. I have a good deal of trouble in finding all the 

 articles, as I am not situated where I have access to an extensive 

 scientific library. It becomes necessary therefore to request and urge 

 that workers in Diptera furnish me with separates of their articles, 

 whether taxonomic or otherwise. In return I will furnish my own 

 separates as far as possible, or will look up bibliography ; as far as 

 my time allows will determine species. J. M. ALDRICH, 238 S. Grant 

 St., La Fayette, Ind. 



