430 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
found in the form and particularly in the sculpture. My first impres- 
sion was that it belonged in Hippodamia but the pronotum is much 
more like that of Coccinella and it seems better to place it in the latter 
genus for the present. The outline was probably similar to that of 
the recent C. trifasciata and less rotund than in the Florissant fossil 
C. sodoma. The generic reference must be understood in the broad 
sense, as it is not likely that the insect was a true Coccinella. 
EROTYLIDAE. 
TRITOMA DILUVIANA, sp. nov. 
Plate 1, fig. 5-6. 
Form elongate, much like the recent T. festiva. Under surface of head 
closely, and, relatively to the size of the insect, moderately coarsely 
punctured at the sides. Eyes elliptical as seen from below, of normal 
size. Antennae about equal in length to two thirds of the prothoracie 
basal width, club composed of three subequal joints. Prothoracie 
length at middle about four sevenths of the basal width, sides con- 
vergent anteriorly and nearly straight in the type, apex about one fifth 
narrower than the base, front angles prominent, punctuation finer than 
that of the head. Meso- and metasternal areas obscurely punctate. 
Abdominal punctuation moderately coarse but shallow and well sepa- 
rated. Legs not preserved. Length, 5.25 mm., in life a little less. 
Described from one specimen showing the underside. 
Type.— No. 2,442 M.C. Z. Florissant, Col. (No. 4,512 S. H. Seud- 
der Coll.). No. 2,443 M. C. Z. (No. 9,097 S. H.. Scudder Coll.) is 
evidently the same species though not the counterpart of the type. 
In the second specimen, the sides of the prothorax are well preserved 
and are seen to be regularly but gently rounded from the base similarly 
to the recent 7’. thoracica or T. flavicollis. This species is easily dis- 
tinguished from the Florissant fossils 7. materna and T. submersa by 
its greater size and more elongate form. 
COLYDIIDAE. 
RHAGODERIDEA, gen. nov. 
General outline of Rhagodera, but with the margins entire or nearly 
so. Elytral sculpture weaker than in Rhagodera, striatopunctate. — 
