TYRINI 339 



devoid of any trace of sulcation. Such a condition is nonhamotine on the one 

 hand, and yet the presence of a sulcus is nonneotyrine so that this sulcus, alone, 

 serves to isolate the genus. The sulcus is very broad and shallow, but the margins 

 are sharply defined. The long, truncate palpal cone is set within the apex of the 

 sulcus, which latter occupies the apical fourth of the segment. In a paratype the 

 distal palpomere is coated with the pearly palpal secretion noted for other 

 genera. 



The males and females resemble each other in coxal spines, trochantal 

 spines, and carinate anterior femora, reminding one of similar nonsexual leg 

 abnormalities in Tyrus. Sex is quickly diagnosed by the shape of the terminal 

 (sixth) sternite, which is a narrow, very short and simple segment in the female; 

 in the male this sternite is deeply incised at the middle of the apical margin to 

 accommodate a discoid penial plate, as in Tyrus. At first I thought that the 

 female sex had the notched terminal sternite but subsequent dissection of a 

 paratype demonstrated the sex and served to impress the author with the ne- 

 cessity for such direct methods. 



Tyrogatunus zeteki new species 



Holotype Male. Measurements: Head 0.47 x 0.43 mm.; pronotum 0.50 x 

 0.50 mm.; elytra 0.67 x 0.94 mm.; abdomen 0.63 x 0.97 mm. Total length (in- 

 cluding cervicum) 2.4 mm. (PI. Ill, XVII, XX). 



Dark reddish-brown, shining and lightly punctulate with the elytra slightly 

 more punctate. Pubescence as described above. 



Head with long oblique tempora which are longer than the eyes. Eyes as 

 described above. Vertex smoothly rounded, with a pair of small, deep, nude 

 fovea on a line through eye centers, and slightly closer to eyes than to each 

 other. Each fovea lies in a depression and the latter is faintly connected with the 

 frontal fovea by a rudimentary, oblique impression. Frontal fovea is larger, pu- 

 bescent, and occupies the apex of a triangular interantennal sulcus. The antennal 

 tubercles, therefore, are oblique. Below each eye is a broad, triangular infra- 

 ocular spine. The ventral surface of the head is simply flattened, with the usual 

 median gular fovea at middle of base. 



Maxillary palpi as described above. 



Antennae half the body length (1.27 mm.) slender: segment I elongate- 

 cylindrical; II smaller, similar; III-VIII obconical, third to sixth longer than 

 wide, seventh and eighth as long as wide ; club poorly differentiated and progres- 

 sively asperate, with IX longer than wide, elongate-trapezoidal; X as long as 

 wide, trapezoidal; XI not as long as preceding two united, with rounded apex 

 and truncate base. 



Pronotum with the hexagonal outline of Neotyrus coptocolus; disc evenly 

 convex; a large pubescent lateral fovea each side and a smaller nude median 

 fovea, these three foveae being connected by an arcuate antebasal sulcus ; basal 

 bead medianly extended as a longitudinal cuneiform carina which reaches lumen 

 of median fovea. 



