90 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



frontal costa, but not nearly twice so broad, the fastigium very strongly 

 declivent, sulcate, with prominent lateral ridges which apically diverge 

 slightly; frontal costa broad, considerably broader than the basal joint 

 of the antennae, not constricted above, more or less sulcate, especially 

 in the male, fading just below the ocellus, and very feebly punctate; 

 eyes not very large, more prominent in the male than in the female, 

 and roundly truncate anteriorly, alike in both sexes, but only in the 

 male as long as the intraocular portion of the genae; antennae consid 

 erably longer (male) or somewhat shorter (female) than head and pro 

 notum together. Pronotuin regularly enlarged posteriorly, a little more 

 in the female than in the male, with no trace of lateral carinae, the pro- 

 zoua fully twice (male) or nearly thrice (female) as long as the metazona, 

 its approximated sulci similar to but less distinct than the principal 

 sulcus, and like it continuous, the median carina hardly existing except 

 on the metazona, where it is feeble; exposed part of mesonotum about 

 half as long as the inetanotum (male, female), the posterior border of 

 the latter slightly (male) or distinctly (female) emarginate. Interspace 

 between mesosternal lobes considerably wider than (male) or twice as 

 wide as (female) the lobes themselves, the metasternal interspace nearly 

 as great. Fore and middle femora very slightly tumid in the male, the 

 hind femora moderately slender, nearly two and a half times as long as 

 the prouotura. Abdomen stout with a distinct but slight median carina 

 in the male, tapering on the basal half, hardly enlarging apically but 

 considerably upturned; supraanal plate of male small, triangularly 

 shield shaped, broader than long, apically angulate, with an unimpor- 

 tant sulcate median ridge on basal half meeting a transverse ridge, 

 beyond which it is depressed; no furcula; cerci very short, conical, 

 blunt, not reaching beyond the middle of the supraanal plate; infra- 

 cereal plates large, mesially ridged, reaching as far as the supraanal 

 plate. 



Body griseo-fuscous, flecked and tinted with sordid luteo-fuscous, 

 lighter beneath, darker above. The vertex and mesial parts of the fas- 

 tigium are fuscous, the lateral ridges of the latter lighter colored, but 

 without a trace of red. The lower half of the lateral lobes of the pro- 

 notum are as light as the under surface, and the upper half as dark 

 as any other part of the body, so as to form a faint dark baud, but the 

 contrasts are not great; the meso- and inetauota, and the posterior 

 borders of the abdominal segments are nearly black; the antennae are 

 sordid luteous at the base, fuscous beyond. Hind femora externally 

 clouded and feebly twice banded obliquely with fuscous; hind tibiae 

 very dull luteous, clouded apically with fuscous in the female, the spines 

 black or brown tipped. 



Length of body, male, 18 mm., female, 28 mm.; antennae, male, 7.25 

 mm., female, 8 mm.; pronotum, male, 3.25 mm., female, 4.6 mm.; hind 

 femora, male, 8.5 mm., female, 11.5 mm. 



One male, 1 female. Placer County, California, September (U.S.N.M. 

 [No. 722]. Eiley collection). 



