42 MEMOIRS ON THE COLEOPTERA 



green but dark violet-blue throughout above, more obscure on the elytra; 

 head rather smaller and with somewhat less prominent eyes; prothorax 

 similar throughout but not quite so short or transverse; elytra similar but 

 slightly less obtusely rounded at tip and with the striae sensibly finer and 

 much less strongly punctate, the intervals flat, not quite so densely 

 punctate; punctures of the under surface scarcely so large but similarly 

 disposed. Length (cf 9 ) 8.5-9.0 mm.; width 3.7-4.0 mm. Texas. 

 Two examples. 



My series of lithophilus is from New Jersey, Pennsylvania and 

 Indiana; indigaceus is a more southern development of the stem 

 form. Caurinus Horn, differs in the form of the prothorax. 



Subfamily MICRATOPINI nov. 



Middle coxal cavities entirely inclosed by the sterna, the suture 

 very fine and close. Head with a single supra-orbital seta. Meso- 

 sternal epimera very narrow, indistinct; elytra covering the ab- 

 domen. Mandibles without an external seta. Posterior coxae con- 

 tiguous. Elytral margin continuous, without an internal plica. 

 Last joint of the palpi minute, slender, oblique and inserted within 

 a cavity at the tip of the penultimate. Body minute; integuments 

 thin; facies nearly as in the Lebiinae. 



Following the order of characters now usually admitted in the 

 classification of the Carabidae, the very small species serving as the 

 type of the new subfamily here proposed, is, as may be surmised, 

 extremely isolated, for, with palpi nearly as in the Bembidiinae 

 and habitus of the body nearly as in the Lebiinae, we have standing 

 out very clearly at the smooth sides of the head, near the eye, 

 only a single long seta, exactly as in all the other CARABID.E CON- 

 JUNCT^ UNISETOS/E.* 



Micratopus n. gen. 



Body very small and feebly convex, oblong-elongate, with thin 

 integuments, rather small short head and large convex eyes. Mouth 

 organs rather crowded. Mentum moderate, nearly flat, oval, 

 slightly transverse, with a moderate and rather deep edentate 

 sinus, the lobes sharply acuminate. Ligula very small, slender, the 

 paraglossae small, externally pointed at apex. Basal joint of the 

 outer maxillary lobe stout, oval, the last joint short, narrower, 



* In contradistinction to the first division of the Carabidse, which may be 

 known as CARABID/E DISJUNCT^;. 



