84 
PROCEEDINGS OP THE ACADEMY OF 
Fort Yuma, California ; one specimen. Differs from our common species l>y 
the smaller size, narrower thorax and by the humeral spot of the elytra "being 
wider behind, and trapezoidal. 
Ceyptocephalus Geoffroy. 
C. s p u r c u s , subcylindricus, fusco-badius nitidus, capite pedibusque flavis, 
thorace convexo parce subtilius punctato, lateribus, margine antico, maculis- 
que duabus baseos pallide liavis ; elytris pallide fiavis, piceo-subvittatis, striis 
profundis punctatis, interstitiis vix convexis nitidis ; subtus flavo-guttatns, 
X>rosterno apice acuto hand carinato, postice emarginato, lobis acutis. Long. 
'17— -23. 
Var. fere totus pallidus, antennis versus apicem punctisque elytrorum solis 
fuscis. 
San Diego, California. Similar in appearance to C. incertus, but larger, 
and having the prosternum prominent in front. The striae of the elytra are 
<|uite as deep as in that species, but the interstices are less elevated : between 
the third and penultimate striae, which as usual unite around the apex, are 
four intermediate strise uniting by pairs ; in the space between the outer two, 
just behind the humerus, are two short strise each consisting of three or four 
points. The dark color on the elytra is seen in the punctures of the strise, at 
the tips of the loops formed by the strise, at the middle and base of the third 
and fifth intervals, on the humerus, and along the outer margin. When the 
under surface is dark colored, the sterna, the pleurse of the mesothorax, the 
middle of the base of the abdomen, and the last ventral segment are yellow : 
the pygidium is yellow, with large brown punctures ; the legs are yellow, the 
middle of the thighs and tibise being sometimes reddish, and the tarsi fuscous. 
* The under surface is almost glabrous and moderately punctured. Of the type 
were procured two males, and of the variety two females. 
Pachybkachys Suffrian. 
P. livens, elongatus oblongus, pallide sulphurous, punctis testaceis in- 
sculptus, thorace latitudine sesqui breviore, sequaliter fortiter minus dense 
punctato, lateribus rectis, antrorsum paulo angustato ; elytris pone scutellum 
et mox ante medium impressis, striatim punctatis, punctis versus scutellum 
confusis, pedibus antennisque concoloribus, oculis nigris. Long. -13. 
Colorado River, California, on Salix. This species belongs to the numerous 
group of indefinite species such as P. abdominalis, tridens, sobrinus, &c., but 
differs from the others by the paler color. The strise of the elytra are impressed 
only behind the middle ; the rows are regular, but closer than usual, and are 
confused towards the suture, where the elytra are irregularly and densely punc- 
tured. The middle of the disc of the thorax is usually marked with a large 
testaceous spot. 
P. caelatus, elongatus oblongus, supra luteus, fusco-variegatus, thorace 
fortiter insequaliter punctato, fusco-trimaculato, elytris striatim profunde punc- 
tatis, striis internis sinuatis et abbreviatis, hand confusis, interstitiis hie inde 
callosis ; subtus nigro-piceus, abdomine flavo-marginato, pedibus testaceis, 
femoribus flavo-maculatis. Long. -12 — '14. 
San Diego and Fort Yuma, California. The head has a vertical line and the 
occiput blackish. The paler parts of the thorax are less densely punctured, 
and in one specimen the dark spots are confluent forming an M shaped figure. 
The three internal strise of the elytra are contorted, and some of them are 
usually abbreviated, and behind the middle one of the intervals is usually 
broader, and more elevated : a few confused punctures are seen here and there, 
but the strise are not lost as in the preceding. The pygidium is yellow with 
three dark spots. This species greatly resembles P. abdominalis, but the dark 
spots of the thorax are more densely punctured, and the strise of the elytra 
are more sinuous. 
