122 
* 
beyond the tip of the pronotum. Pronotum, with the sides of the an 
terior lobes parallel, the posterior lobe expanding rapidly backward; 
median carina thread-like, but always distinct on the posterior lobe, 
usually obsolete on the anterior lobes; lateral carinae obtuse but dis¬ 
tinct on che posterior lobe and usually so on the middle one but 
becoming obsolete toward the front; posterior lateral margin, perpen¬ 
dicular from the humeral (entering) angle one-third the way down, 
then curving forward to the posterior lateral angle which is obtuse 
and rounded; the (entering) humeral angle is sharply defined, and in 
this respect differs from C. femur-rubrum and C. atlantis/ the apex is ob¬ 
tuse-angled (about 100°) rounded at the point; posterior lobe minutely 
and shallowly punctured throughout*; the anterior lobes smooth with 
few or no punctures except, along the lower margins of the sides. 
Elytra and wings extending beyond the tip of the abdomen from one- 
fourth to one-third their length; the elytra are of nearly uniform 
width throughout, slightly curving upward at their extremity; wings 
a little shorter than the elytra, very thin and delicate; nerves and 
nervules very slender. Abdomen, and in fact the whole insect rather 
more slender than usual in this genus; but this appearance is partly 
due to the elongated wings; cerci very small, triangular or tooth¬ 
shaped, not extending across the segment on which they rest; valves 
of the ovipositor quite prominent, especially the upper pair which are 
more than* usually exserted, sharp at the tips and deeply excavated 
above. The posterior femora usually extend to or about to the tip of 
the abomen. 
Fig. 20. 
Tip of the male abdomen 
of spretus; a lateral view 
of the terminal segments; 
b under side of terminal 
segment; c upper side of 
same. 
Color. —Reddish-brown with fuscous spots. Head 
and the pronotum back to the posterior sulcus 
reddish-brown, varying in depth of color in indi¬ 
viduals; the face is sometimes of a lighter and 
brighter red than the pronotum, sometimes darker, 
assuming a dark purplish hue; the posterior lobe 
of the pronotum is generally a pale olive-brown, 
its lighter color contrasting somewhat distinctly 
with the darker shades of the anterior portion. 
Some individuals exhibit much lighter colors than 
here described, varying from a dark-brown to a 
dull yellow. The dark line on the side of the 
head and pronotum, usually so conspicious in the closely allied spe¬ 
cies, is generally obliterated in this species by the dark-brown color; 
but it usually appears distinctly in specimens which have been 
immersed for sometime in alcohol, and is also manifest in the pale 
individuals, but is broken up by pale spaces and lines, and is rather 
narrow; the eyes shining black; elytra ash-brown, more or less tinged 
with red dish-brown at the base and fading toward the apex; in the 
middle field, commencing near the base, where this field comes to a 
point, is an irregular row of fuscous dots, usually single to where the 
thin portion commences, now and then a double dot appearing; from 
this point to the apex they decrease in size and distinctness, and 
spread over the entire width; as a general rule the inner field is mark¬ 
ed with a few fuscous dots, in some individuals a few quite distinct 
are seen, in others they are very minute and dim, and not unfre- 
quently they are entirely wanting. Wings transparent, with a very 
slight yellowish tinge at the base; nerves and nervules of the costal 
