NORTH AMERICAN C()LK<)l'li;i;A. 217 



Group II, farcta. 



Form more or less ventricose and convex. Clypeus entire, or 

 faintly sinuate. Antennae 10-jointed. Last joint of maxillary palpi 

 fusiform or ovate, feebly or not impressed. Thorax broadest at 

 middle, narrowed at apex and base, the nuirgin more or less serrate. 

 Metasternum shorter than normal, very short in the females of all 

 and also the S of cribrosa. Legs stouter in the females, the hind 

 tarsi much shorter. Antennae 10-jointed. 



The group has but one peculiar character common to all the spe- 

 cies the form of the thorax. All three are dissimilar in appearance, 



and with more species might be separated into separate groups. 



One species was made the type of Eugastra, for the retention of 

 which no valid reason exists. 



The species are as follows : 



Elytra subsulcate, both sexes apterous, the metasternum very short. 



2. cribrosa. 

 Elytra without grooves, at most with the normal costse feebly iudicatea ; both 

 sexes very feebly winged. 



Pieeous black ; elytra with scattered white scales 3. sequalis. 



Chestnut brown or pieeous; elytra without scales or hairs 4. farcta. 



These species belong to the Rio Grande Valley and northward. 



2. Li. cribrosa Lee— Broadly ovate and convex, pieeous black, shining. 

 Clypeus feebly sinuate, margin narrowly reflexed. surface densely punctured and 

 opaque, punctures coarser in the female. Thorax obtusely angulate at middle, 

 narrowed at base and apex, margin coarsely serrate and ciliate; surface very 

 coarsely, densely and moderately deeply punctured ; a short, smooth, median 

 line. Scutellum in both sexes short and transverse. Elytra with basal margin 

 slightly reflexed, form broadly oval ; surface subsulcate, or (if preferable) with 

 eight obtuse discal costas, the intervals coarsely, confluently punctured. Py- 

 gidium with coarse, shallow, sparsely placed punctures. Metasternum very 

 coarsely, not densely punctured, tbe hairs extremely short. Abdomen sparsely 

 coarsely punctate. Claws arcuate, a moderately long acute tooth near the base 

 in both sexes. Last joint of maxillary palpi ovate, with a feeble impression. 



Metasternum short, body apterous in both sexes. Length .G.i— .90 inch ; 16.5 — 

 23 mm. 



Male.— Antennal club not as long as the funiculus. Abdomen 



broadly impressed at middle. Hind tibial spurs slender, the tarsi 



much longer than the tWnve. 



Female.— Antennal club small and lenticular. Posterior legs 



stouter than in the male, the tarsi not longer than the tibiio, spurs 



slender, but broader than in the male. 



TRANS. AMER. ENT. SOC. XIV. (28) NOVEMBER, 1887. 



