HENICOCEPHALUS, 161 
lobe convex, not much narrower than the posterior lobe, and laterally as long as it, rounded at the sides, 
deeply sulcate down the middle and with a short distinct longitudinal sulcus on euch side behind, the 
median sulcus terminating posteriorly in a deep transverse groove ; the posterior lobe moderately convex, 
very deeply and angularly emarginate behind, leaving the scutellum largely exposed, the sides rounded. 
Scutellum feebly transversely swollen at the apex. Anterior legs with the femora moderately incrassate, 
the tibie broadly dilated outwards, and the tarsi with a single long claw. 
Length 43 millim. 
Hab. Guatemata, Cerro Zunil 5000 feet (Champion). 
One specimen. Differs from H. emarginatus in the small ocelli, the broader 
posterior lobe of the head, the long antennz, the broader and longer intermediate lobe 
of the pronotum, the more thickly pilose head and pronotum, &c. 
4. Henicocephalus emarginatus, n. sp. (Tab. X. figg. 4; 4 a, anterior leg.) 
Sparsely pilose, fuscous, the pronotum paler in front, the rostrum, neck, abdomen, and legs flavous, the 
anterior tibie slightly infuscate, the elytra brownish-hyaline, the antenne brownish, with the outer half 
_ of the apical joint flavous; the pronotum slightly shining. Posterior lobe of the head very convex, 
transverse, finely sulcate down the middle between the large and prominent ocelli, extending outwards 
to nearly as far as the eyes; antenne about reaching the shoulders of the pronotum, joints 1 and 2 
stouter than the others, 1 short, 2 slightly shorter than 3, 3 and 4 subequal in length. Pronotum with 
a short well-defined collar in front; the intermediate lobe shorter than the posterior lobe, convex, 
rounded at the sides, deeply sulcate down the middle and with a short indistinct longitudinal sulcus on 
each side behind, the median sulcus terminating posteriorly in a deep transverse groove; the posierior 
lobe moderately convex, much broader than the intermediate lobe, very deeply and angularly emarginate 
behind, leaving the scutellum largely exposed, the sides rounded. Scutellum with a smooth transverse 
convex prominence at the apex. Anterior legs with the femora feebly incrassate, the tibie moderately 
dilated outwards, and the tarsi with a single long claw. 
Length 34 millim, 
Hab. GuatEMALA, El Reposo (Champion). 
One specimen. This species is closely allied to H. flavicollis, Westw., from 
St. Vincent; but in that insect the anterior and intermediate lobes of the pronotum 
are entirely flavous, the intermediate lobe is more developed, and the ocelli are smaller 
and less prominent. 
5. Henicocephalus angustatus, n.sp. (Tab. X. fig. 5, head, antenne, pro- 
notum, and anterior legs.) 
Sparsely pilose, shining, very narrow, rather robust, rufo-piceous, the antenne, rostrum, abdomen, and legs 
testaceous or fusco-testaceous, the elytra pale fuscous. Posterior lobe of the head as long as broad, 
smooth, as wide as the anterior part (including the eyes), convex, unimpressed, the ocelli prominent ; 
antenne slender, the basal joint slightly stouter than the others, 2 and 3 subequal in length, 4 a little 
shorter than 3. Pronotum feebly emarginate in front, the narrow anterior lobe finely sulcate down the 
centre ; the intermediate lobe convex, considerably longer than the posterior lobe, rounded at the sides, 
deeply sulcate down the middle, the sulcus terminating in a deep fovea posteriorly in one specimen ; the 
posterior lobe somewhat flattened on the disc, not very deeply emarginate behind, the sides obliquely 
converging forwards. Scutellum longitudinally carinate at the apex. Elytra with the discal cell open. 
Legs comparatively stout ; the anterior pair with the femora greatly incrassate, the tibie broadly dilated 
outwards, and the tarsi with two long claws. 
Length 4 millim. 
BIOL. CENTR. AMER., Rhynch., Vol. II., October 1898. 21 
