i we 
Horn. ] 506 [April 19, 
D. ormata Lec. Proc. Acad. 1858, p. 63. 
This species resembles the preceding, but has a relatively 
narrower thorax, intervals between the elytral costs more 
finely punctured, and with two rufous spots on each, one 
oblique at the humeri, another oval behind the middle. 
Length .12 inch; 3 mm. 
The differences although feeble are constant, and the 
facies of the two species is sufficiently marked to retain them 
as distinct. 
Occurs under bark in south-eastern California and Arizona. 
D. sulcata Lec. Proc. Acad. 1858, p. 63. 
Resembles quadriguttata in form, pale brownish, opaque. 
Elytral intervals with coarse punctures biseriately arranged, 
but not very closely placed. Antennee with ninth joint one- 
half wider than the eighth. Length .12 inch; 3 mm. 
The principal difference between this and the preceding 
species are the uniform color, and the structure of the an- 
tenne. 
Occurs under bark with ornata. 
EUDESMA Lec. 
Antenne received in repose in oblique grooves, 11-jointed, last two form- 
ing an abrupt mass, first two joints shorter, the second rather longer than 
the first, third slightly longer than the fourth, 4-9 sub-equal, tenth abruptly 
larger, semi-circular in outline, last joint narrower, oval, pubescent at tip. 
Head broader than long, clypeus truncate. Labrum almost entirely re- 
tracted. Eyes entire, rounded, moderately convex.’ Mentum transverse, 
slightly rounded in front. Last joint of maxillary palpi, longer than the 
two preceding, slightly flattened, truncate at tip. Antennal groove deep, 
oblique. Thorax quadrate, lobed at middle in front. Scutellum small, 
round. Elytra elongate, parallel, costate. Posterior coxe transverse, in- 
tercoxal process narrow, acute at tip. Metasternal side pieces almost en- 
tirely concealed by the elytra, Abdominal segments gradually decreasing 
in length, fifth a little longer than the fourth, posterior margin straight. 
Tibize slender, not spinulose externally, and with minute terminal spurs. 
Tarsi short, first three joints nearly equal, together shorter than the fourth, 
beneath sparsely hairy. 
I find no genus with which this may be compared, ex- 
cepting Ditoma. Phormesa Pase. differs from Ditoma in the 
same manner that this does, but the form of the body is 
somewhat peltiform. 
