318 WILLIAM J. FOX. 



PASSAL.<ECUS Sbuckard. 

 FEMALES. 



Third antennal joint distinctly longer than the fourth ; the two longitudinal, 

 parallel impressions on anterior portion of dorsulnm not foveolate; legs 

 black, front tibiae in front and the base of the four biud tibifo, yellow; 

 tarsi testaceous. Length 6 — 8 mm tniiiidibularis. 



Third antennal joint not longer than the fourth ; tbe two longitudinal impressed 

 lines on the anterior part of the dorsulum strongly foveolate; ajiex of 

 femora, tibiae and tarsi yellow testaceous. Length 5 mm..aiiiiiilatii!$. 



MALES. 



1. Antennsp not spinose or dentate beneath, but strongly rounded out. black 



above, white beneath 2. 



Antennse spinose, or dentate beneath 3, 



2. Antennfe long, reaching a little beyond the teguke, third joint nincli shorter 



than the fourth, tbe apical joint about one-quarter longer than tbe 

 preceding one; two impressed lines on anterior portion of dorsulum 



strongly foveolate aiiiitilal us. 



Antennae shorter and stouter, scarcely reaching the tegulae. third joint as long 

 as the fourth, the apical joint about one-third longer than the preceding 

 one : impressed line on anterior part of dorsulum not foveolate. 



relativuM. 



3. Eleventh joint of antennae much larger and broader than the others, angular, 



in consequence of which the two apical joints are turned backwards, 

 joints 6 — 8 beneath with a slight spine at apex, joints 7 — 10 roundly 



eniarginate (liMtiiirtus. 



Eleventh joint of antennae not larger or broader than the others, not angular.. 4. 



4. Antennae black beneath, joints 5—9 beneath spinose at tip, the tenth to 



twelfth joints incurved or roundly emargiuate, so that their base has 

 appearance of being dentate; space between hind ocelli about equal to 



that between them and the nearest eye margin maiiilibiilaris. 



Antennae testaceous beneath, joints 5 — 8 spinose at tip, the seventh and eighth 

 indistinctly so, none of the remaining joints appearing dentate, but are 

 rounded out; space between hind ocelli greater than that between them 

 and the nearest eye margin (lii^par. 



1. Passaloecus aniiulatiis Say. 



9. — ^Front very finely and closely punctured, tbe punctures very dense me- 

 dially, and become more sparse and distinct on tbe vertex; frontal impression 

 distinct ; ocelli situated in pits, the distance between the bind pair is about equal 

 to that between them, and the nearest eye margin ; third joint of antennae about 

 equal iu length to tbe fourth, the apical joint about one-third longer than the 

 preceding one ; the cheeks even more finely punctured than the front; dorsulum 

 punctured about like the front, the two longitudinal impressed lines on anterior 

 portion very strong and foveolate, the lateral margins also strongly foveolate; 

 .scutellum and postscutellum similarly punctured, not impressed; metathoras 

 above and posteriorly strongly rugose or rugged, the sides also rugose, excejit the 

 basal portiou, which is obliquely and finely striated ; furrow which separates 

 meso- and metapleurae deep. Abdomen glabrous, irapuuctate ; black ; clypens and 



