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are the Pygofers; they are placed on each side enclosing the anus, 

 and are approximate above and below, and in these descriptions 

 have, for the sake of convenience, been considered as one; as a rule, 

 the aperature formed by them is somewhat oval, with the narrow 

 end within on the ventral surface; here are attached the hooks or 

 claspers, which are more or less slender, spine-like processes, curved 

 inward and upward toward the anal style. Sometimes the pygofers 

 are much elongated, and their surface, or at least their apical margin, 

 is generally beset with stiff bristles. In both sexes, but particularly 

 in the females, the form of the hind edge of the last ventral segment 

 is very various in the different species, and is a specific character of 

 primary importance. The sexual characters of the female, aside 

 from the form of this ultimate ventral segment, are of a simple kind, 

 and of but little comparative importance. The pygofers, which con- 

 stitute most of the visible portion of the genitalia, present slight 

 variations in form, but are of little value in determining the species. 



For drawing up these descriptions I have used a compound 

 microscope with an inch and one-half objective, but the more im- 

 portant characters could probably be made out with a good Cod- 

 dington lense magnifying about fifteen to twenty diameters. 



The locality from which this material was derived may be stated 

 as Southern California. Most of it was obtained, Mr. Coquillett 

 informs me, from the vicinity of Los Angeles, only a little from as 

 far north as Newhall, about thirty miles. The numbers appended 

 to the descriptions are those of Mr. Coquillett' s collection. 



BYTHOSCOPID^. 



1. Pediopsis nubila n. sp. Bythoscopus nubilus Uhl. ms. 



Form of P. punctifrons, but larger. Head obtusely angled before, pro- 

 notum coarsely punctured, without oblique rugae. Elytra almost coriaceous, 

 coarsely punctured, with numerous irregular transverse nervures almost ob- 

 literating the ordinary venation. Pale grayish brown; elytra whitish, clouded 

 witli brown. Length 3.5 — 4 mm. 



Head broader than the pronotuni, rather obtusely angled. Face coarsely 

 punctured above, more minutely so below; apex of the front broad, angles 

 rounded; clypeus broad, the sides parallel, apex rounded and a little de- 

 pressed beyond the lone, furnished with a few short stiff hairs on the margin; 

 lorae broad, transverse, almost angled outwardly. Rostrum long, reaching 

 the apex of the intermediate trochanters. Pronotuni rather long, posterior 

 margin less deeply arcuated than in our other species: latero-posterior mar- 

 gins reaching the eyes; surface coarsely punctured, punctures not obviously 

 arranged in oblique lines; a more or less distinct impunctured central line. 

 Scutellum, excepting the basal angles and the calloused margin each side of 

 the apex, coarsely punctured. Superior surface of the propleura hidden 



3* 



