170 NORTH a:merican 



interocular surface moderately convex, declivous toward tlie epistoraal sntnre 

 which is transverse and very strongly marked, terminating laterally at the 

 supra-antennal tiiberculations which are very strong ; epistoma short, four 

 times as wide as long, strongly sinuate anteriorly ; labrum very short, 

 strongly sinuate ; antennae much longer than the width of head, slender, 

 two basal joints moderately robust, slightly elongate, equal in length, third 

 much longer than the fourth, fourth and fifth siib-equal, seventh longer than 

 the sixth or eighth, the former longer than the latter, ninth equal to the 

 seventh, last two joints more robust, compressed, equal in length, the tenth 

 triangular, the eleventh conoidal, both as wide as long ; last joint of the 

 maxillary palpi twice as long as the third, moderately slender, acuminate. 

 Prothorax widest at one-third the length from the apex where it is one-half 

 wider than the head and about as wide as long ; sides strongly arcuate 

 anteriorly, strongly convergent and straight posteriorly ; basal angles obtuse, 

 not rounded, base one-third longer than the apex, arcuate except near the 

 basal angles ; apex rery feebly arcuate ; apical angles obsolete from above ; 

 disk moderately convex, scarcely impressed along the middle except near 

 the base where there is a very narrow short canaliculation. Elytra at base 

 about as wide as the pronotum ; sides parallel and straight for five-sixths 

 the length from the base, then obtusely rounding behind ; humeral angles 

 narrowl}' rounded ; disk sub-cylindrically convex, nearly twice as long as 

 the head and prothorax together, two and one-third times as long as wide, 

 shining, strongly and rather closely punctate ; punctures elongated longi- 

 tudinally and arranged serially ; near the suture they are smaller and more 

 confused. Scutellum minute, wider than lojig, tuberculiform. Abdominal 

 segments moderately convex, decreasing almost uniformly in length, finely 

 and strongly granulo-rugulose, more coarsely so toward base, very sparsely 

 pubescent. Legs sliort and slender ; first joint of tbe posterior tarsi very 

 minute, last equal in length to the first four together ; anterior coxae mutu- 

 ally one-fourth as distant as either from the anterior margin of the pro- 

 sternum. Length 2.8-3.2 mm. 



Arizona (IMorrison), 2. 



Differs very greatly from planicoUis Lee. in size, sliape of the 

 pronotum and sculpture, especially tliat of tin; under surface of the 

 abdomen, this being much coarser in parvulus. In both these species 

 the outer apical angles of the anterior tibiae are sliglitly prolonged ; 

 in Trogoxylon, however, tliey are iu>t prolonged, but merely very 

 acute. 



SEICICA MacLeay. 



S. parallela n. sp. — Form sub-cylindrical; sides parallel ; color pale 

 yellowisli-t>rruginons, legs and under surface slightly jialer, concoloroiis; 

 integuments opaque throughout, not iridescent. Head one-half wider than 

 long; occiput very finely sparsely and feebly punctate; clypeus strongly 

 rather finely and not rugulosely punctate ; epistomal suture very fine, clearly 

 defined, roundly angulate posteriorly, anterior margin sinuate in tlie middle 

 and refit'xed ; eyes very large, convex ; last joint of the maxillary palpi 

 three times as long as wide, slightly clavate, rather obtusely acuminate at 



