NATURAL SCIENCES OF PHILADELPHIA. 
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postice sulco profundo transverso striola basali utrinque terminata exarata, ely- 
tris fortiter striatim crenatis, interstiis parce punctulatis, antennis pedibusque 
rnfo-testaceis. Long. -10. 
Fort Yuma, California. Entirely of the size, form, and sculpture of H. 
ii e i X i n e s (var. nana Say)^ but the sides of the thorax are less rounded in 
front behind the apical angles. 
H. mitis, elongata, capite fortius punctato, fusco-testaceo, medio sublaevi, 
thorace pallido, latitudine parum breviore, lateribus nigris antice rotundatis, 
parce subtiliter punctulato et parcius punctato, prope basin linea transversa 
x^age irapressa ; elytris punctulatis, obscuris, vitta dorsali apicemhaud attingente, 
raargineque postico pallidis, ore postpectoreque nigro-piceis, antennis fuscis, 
abdomine fusco-testaceo, pedibus testaceis plus minusve infuscatis. Long. -15. 
Colorado River, California. Very nearly resembles H. b Ian da {Systena 
bhxnda Mels.), but the head is more punctured and the elytra are less densely 
punctulate. 
H. ochracea, elongata, supra ochreo-flava nitida, capite antice parce punc- 
tato. thorace latitudine breviore punctulato et parce punctato, antrorsum angus- 
tato, lateribus rectis postice linea transversa vage impresso, elytris subtilius 
punctulatis, subtus fusca, antennis pedibusque testaceis. Long. -15. 
One specimen, San Diego, California. This specimen, with the preceding be- 
longs to the group named Systena by Mr. Chevrolat, but is very different from 
any other in my collection. 
LoNGiTARSus Latr. 
L. m a n c u s, apterus elongatus, subcylindricus, asneo-niger, capite laevi, 
thorace punctato latitudine breviore, lateribus late rotundatis, elytris thorace 
parum latioribus, punctatis, ad apicem divergentibus et singulatim rotundatis, 
ano prominulo, pedibus antennisque rufo-piceis, his articulis 2ndo tertioque 
:fiqualibus. Long. -07. 
Gila River, below the Pima villages. The form is nearly that of L. t e s t a c e a 
{Teinodactyla testacea Mels.) but the absence of wings, and the separately 
rounded elytra are characters known to me only in this and the next species. 
L. apterus, apterus, elongatus subcylindricus, convexus aeneo-niger, capite 
laevi, thorace versus latera parce punctulato, latitudine breviore, lateribus late 
rotundatis, elytris thorace parum latioribus punctatis, ad apicem divergentibus 
et singulatim rotundatis, ano prominulo, pedibus antennisque testaceis, his ex- 
trorsum fuscis, articulis 2ndo Sioque aqualibus, femoribus posticis fuscis. 
Long. -05 — •0'7. 
Found with the preceding, which it resembles, except in having the thorax 
only finely punctured towards the sides. 
L. repandus, alatus, flavo-testaceus nitidus, thorace latitudine breviore, 
subtilissime parce punctulato et ruguloso, lateribus late rotundatis subrepandis, 
elytris thorace sesqui latioribus, oblongo-ovalibus convexis, punctulatis et 
transversim subrugosis, antennis elongatis versus apicem paulo infuscatis. 
Long. -07. 
San Diego, California. 
L, li ve n s, alatus, supra flavo-testaceus nitidus, thorace latitudine breviore, 
subtiliter punctulato, lateribus late rotundatis, elytris thorace paulo latioribus, 
elongatis ovalibus, sat dense subtilius punctatis, antennis elongatis versus 
apicem parum infuscatis ; subtus fuscus, pedibus testaceis. Long. -07. 
One specimen, Fort Yuma, California. 
PsYLLiODBS Latr. 
P. i n t e r s t i t i a 1 i s, ovalis paulo convexus, nigro-aeneus nitidus, capite 
thoraceque fortius baud dense punctatis, hoc latitudine breviore, lateribus rectis 
angulis anticis oblique truncatis, elytris thorace latioribus, striatim punctatis, 
1858.] 
