PINOPHILUS. 627 
female exponents are truly conspecific, as the species in this group can scarcely be satis- 
factorily determined without a knowledge of the male characters. 
17. Pinophilus cribricollis. 
Nitidus, niger, laxe pubescens, elytris rufis; antennis, palpis pedibusque flavis, geniculis posterioribus 
fuscis ; prothorace vix transverso, lateribus rotundatis, basin versus angustatis, crebrius fortiter punctato, 
absque linea impunctata. 
Long. 13 millim. 
Hab. Guatemata, Senahu in Vera Paz (Champion). 
The thorax in this species is only about as broad as long; it is coarsely punctured, 
and there is no smooth space along the middle, or rather there are along the middle 
two very closely approximated irregular series of slightly larger punctures, scarcely 
distinguishable from the other punctures and so close together as to leave no distinct 
space between them. In other respects P. cribricollis is very similar to P. validus, but 
the male characters are different: the last ventral plate is not greatly produced in the 
middle, and has a rather broad slightly emarginate hind margin ; the ventral valve of the 
segment of the armature is very peculiar in form, ¢. g.it is large, and the sides are raised, 
the apical portion being gently flexed upwards, the flexed portion forming two lobes 
separated by a deep and extremely narrow excision, and the apices of these lobes are a 
little deflexed. 
We have received two male examples, one of them immature. 
18. Pinophilus parvicornis. 
Niger, nitidus, laxe pubescens ; antennis, palpis pedibusque pallide flavis, illis brevibus. 
Long. 12 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet, Bugaba (Champion). 
Antenne slender, reaching only as far back as the hind margin of the thorax. 
Thorax about as long as broad, coarsely punctate, very shining, without smooth space 
on the middle, but with a round smooth spot on either side near the front angle, the 
hind angles much rounded. LHlytra longer than the thorax, shining black, very 
coarsely and not closely punctate. Hind body slender, rather closely punctate. The 
male has the last ventral plate much prolonged, and its hind margin very slightly 
emarginate; the ventral valve of the armature is abruptly bent upwards at the 
extremity so as to close the aperture of the body. 
This insect is more slender than P. reflexus, and readily distinguished from that species 
by the black elytra. Only one example was obtained in each locality. 
19. Pinophilus longicornis. (Tab. XVI. fig. 15.) 
Niger, nitidus, longius, laxe pubescens; antennis, palpis pedibusque pallide flavis, illis longioribus. 
Long. 14 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 4000 feet, Bugaba (Champion). 
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