THE CANADIAN ENTOMOLOGIST. 291 



9 s and three of ç^s measure 29 to 31 mm. I observed this species at 

 Hermosillo, Sonora, in Sept. 1894, on the sand of the dry bed of the Rio 

 Sonora. 



64. Doryclus distendens Wd., var. varipennis Walk. 



San José del Cabo. One 9 , Sept. 



Dr. Williston places Walker's species as synonymous with distendens^ 

 but it may be considered a good variety on the strength of the two brown 

 cross-bands of the wings. This is the first exact record of the species 

 from north of Guatemala. 



The present specimen is a strongly aberrant one, with body almost 

 wholly brownish red, front tibiae and metatarsi not at all blackish ; and 

 the fourth posterior cell wide open, being as wide on margin of wing as 

 the first posterior cell. The lateral thoracic vitta? are grayish pollinose, 

 but the two middle vittse are tawny grayish. The middle vittse are not 

 elongate cuneiform from a hind view (see O. S., Biol. C. A. Dipt., I, 182), 

 but are distinctly equilateral, well separated and parallel. From a front 

 view they do appear elongate cuneiform. Abdomen is almost wholly 

 brownish red, with only flakes of blackish in places, especially on underside. 



Since Jaennicke's figure represents Doryclus distendens with the fourth 

 posterior cell completely closed, I infer that this is the normal venation 

 of the genus. Whether the present form should be separated on account 

 of this cell being wide open I cannot now decide. As it otherwise agrees 

 so closely with Doryclus in the more important characters, I refer it here. 



Apiocerid^. 

 2(i, Rhaphio7nidas xa?ithos Towns. 



San José del Cabo. One cT, apparently not maturely coloured, 

 seems to be this species. Sept. 



Length, nearly 25 mm. This is the only specimen o{ Rhaphiomidas 

 in the lot, which seems strange since so many occurred in the previous 

 sendings. The wings do not quite reach the tip of the abdomen. 

 Segments 6, 7 and 8 of abdomen together about as long as 5, which 

 is but a little shorter than 3. It seems that in the previous descrip- 

 tion a segment was missed, which is revealed in this less matured 

 specimen. 



SyRPHID/E. 



65. Chrysogaster bellula Will. 

 Tepic— One 9 , Nov. 

 Length, 4^^ mm. Resembles intida in antennae, which are much 



