90 VROCEEDIXGS OF THE NATIONAL MVSEUM. vouxx. 



frontal costa, but not nearly twice so broad, the fastifeium very stronpfly 

 decliveut, sulfate, with pioniiueut lateral ridges which ai)ically diver«;e 

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

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

 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. Pronotum regularly enlarged posteriorly, a little more 

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

 zona fully twice (male) or nearly thrice (female) as long as the metazoiia, 

 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 feejDle; exposed part of mesonotum about 

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

 the latter slightly (male) or distinctly (female) emarginate. fntersi)ace 

 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 pronotum. Abdomen stout with a distinct but slight median carina 

 in the male. tai)ering on the basal half, hardly enlarging apically but 

 considerably upturned; supraanal plate of male small, triangularly 

 shield shaped, broader than long, apically angulate, with au uiiimpor 

 tant sulcate n)edian 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 band, but the 

 contrasts are not great; the meso- and metanota, and the jiosterior 

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

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

 clouded and feebly twice banded oblicpiely 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, 7.2r> 

 mm., female, 8 mm.; pronotum, male, 3.25 mm., female, 4.0 ram.; hind 

 femora, male, S.~^ mm., female, ll.~> mm. 



One male, 1 female. I*lacer County, California, September (U.S.N.M. 

 [No. 722].— Riley collectiou). 



