nature of the subjects, and measurements must be taken from 

 the text. 



Arranged by families, the new species are : — 



EROTYLIDAE. 

 Tritoma petrefacta 



CRYPTOPHAGIDAE. 

 OTptophagus petricola 



NITIDULIDAE. 

 Miophenolia cilipes 



MALACHIIDAE. 

 Malachius pristinus 



PTINIDAE. 

 Oligomerus breviusculus 



SCARAB AEIDAE. 



Lachnosterna (?) extincta 



CERAMBYCIDAE. 

 Saperda florissantensis 



EHYNCHITIDAE. 

 Rhynchites vnlcan 

 Rhynchites laminarum 

 Eugnamptidea robusta 



CURCULIONIDAE. 



Apion florissantensis 

 Apion scudderianum 

 Ceutorhynchus blaisdelli 

 Baris antediluviana 

 Baris renovata 

 Baris nearctica 

 Miogeraeus recurrens 

 Centrinus hypogaeus 



SCOLYTIDAE. 

 Pityophthoridea diluvialis 

 Adipocephalus hydropicus 

 Phloeotribus zimmermanni 



TRITOMA PETREFACTA sp. nov. 

 (Plate I, Fig. 4). 



Form stout, something as in the recent T. unicolor. Head, viewed from 

 above, broader than long, front and vertex finely sparsely punctured. Eyes 

 not well defined. Antennae slender basally and with the margins of the 

 joints rather obscure, especially on the club which seems to be three- jointed, 

 relatively longer and narrower than in the species with which it has been 

 compared. Prothorax about two and two-fifths times as broad as long, 

 much narrowed anteriorly, sides nearly straight, front angles acute, pro- 

 jecting forward, base broadly rounded, surface ver\- inconspicuously punc- 

 tured. Scutellum small but distinct. Elytra striatopunctate. Underside 

 rather finely, sparsely and obscurely punctured except on the thoracic side 

 pieces where the sculpture is much coarser and stronger. Legs wanting. 

 Length 5.50 mm. 



Described from one specimen, with counterpart. 



Compared with the other Florissant species of this genus, the 

 beetle is much larger than T. suhmersa and of a different shape 

 from T. diluvialis. The remaining species, T. materna, is consid- 

 erably smaller than T. petrefacta but on account of its being 

 preserved in profile one cannot make satisfactory comparisons 

 as to form. Compared with recent American species of Erotyli- 

 dae, I find that T. petrefacta approaches Mycotretus and the 



