TYRINI 303 



niger Snyder by Alfred Emerson on Barro Colorado Island, Gatun Lake, Pan- 

 ama Canal Zone. Holotype on April 30, 1935, and allotype on April 30, 1935. 



The maxillary palpi and slightly unequal tarsal claws are intermediate be- 

 tween Phalepsus and Neotyrus s.s. on the one hand while the oblique scariform 

 truncature of the dorsal apex of the distal palpomere tends towards Tyro- 

 gatunus. This distinctive species also approaches Tyrogatunus and the nearctic 

 Tyrus in common trochantal and femoral modification of both sexes as well as 

 sexual differences in the form of the last sternite. This genus may have to be 

 broken up, but for the present the species of Neotyrus may be listed as follows: 



coptocolus new species. Panama Canal Zone (con Coptotermes niger). 



gibbicollis (Schaufuss) . 1886. Amazon basin, Brazil (Aplodea) Geno- 

 type. 



harem new species. Panama Canal Zone (con Coptotermes niger), 



vestitus Raffray. 1908. Buenos Aires, Argentina. 



JUXTAHAMOTOPSIS new genus 



This new genus is distinct from other Tyrini on the following combination 

 of characters: (1) head elongate-subtriangular with prominent post-median 

 eyes, a pair of small vertexal foveae, and a long narrow, medianly sulcate ver- 

 texal-frontal field ending in a small bilobed antennal tubercle; (2) antennae 

 nongeniculate, eleven-segmented, with an inconspicuous club composed of the 

 last three segments which are very elongate-cylindrical and as long as the pre- 

 ceding eight segments united; (3) maxillary palpi (PI. XX) short, four-seg- 

 mented, with the last segument non-sulcate but covered with short, spike-like 

 setae; (4) pronotum with strongly convex disc, and lateral margins biconvex as 

 a consequence of a large triangular fovea, large circular median basal fovea, 

 no sulci ; (5) elytra with two large basal foveae, a dorsal depression, and an en- 

 tire sutural stria on each elytron; (6) abdomen with five visible tergites and six 

 sternites, margins very strongly developed and broadened, tergites progressively 

 shorter, second and third sternites longer than others; (7) intermediate legs 

 strongly macrosceline; (8) pubescence thick-shafted, setiform, not scaly; (9) 

 tarsi three-segmented, not bilobed, third tarsomere much longer than second, 

 second much longer than first; two long, equal tarsal claws; (10) male sex with 

 anterior legs greatly modified as described in genotype; female sex unknown. 



Juxtahamotopsis bardeni new species 



Type Male. Measurements: Head 0.44 x 0.35 mm.; pronotum 0.47 x 0.47 

 mm.; elytra 0.53 x 0.93 mm.; abdomen 0.84 x 0.97 mm.; total length 2.3 mm.; 

 greatest width 0.97 mm. (PI. XX) 



Body reddish-brown, shining, pyriform contour as a whole, being progres- 

 sively wider to first visible tergite. Punctation diverse: antennal tubercle with 

 a few very coarse punctures, and the rest of the head, pronotum, and abdomen 

 nearly impunctate; elytra very sparsely asperate; antennal club and femora 



