22 
Psyche 
[Vol. 94 
The suite of male characters used in discrimination of species of 
Gerallus and Tyromorphus occur in different areas of the body for 
each genus. Tasmanityrus possesses only a few simple male charac- 
ters on the mesotrochanters and mesotibiae, which occur in many 
other genera, but with the unique feature of having lost either the 
right or left paramere. The remaining paramere is more developed 
than in groups with two parameres, and projects to either side. In 
Gerallus the parameres are free and elongate, while in Tyromorphus 
they are reduced and symmetrical. Based on the aedeagal charac- 
ters, the male cuticular modifications, and the palpal form, it is clear 
that this is a monophyletic group of seven very similar species which 
is perhaps closest to, but distinct from, Gerallus. 
Type species, Tyromorphus auricomus Lea. Gender of genus, 
masculine. 
Tasmanityrus n. gen. is characterized by: head with nude vertexal 
foveae, paired gular foveae, segments II-IV of maxillary palpi 
clearly pedunculate at base, antennal club of last three flagello- 
meres; prothorax with small median and lateral antebasal foveae, 
lacking transverse antebasal sulcus, procoxal foveae present; elytra 
with two large basal pubescent foveae, discal stria distinct past mid- 
dle of elytra; tergite I with three basolateral foveae, anterior foveae 
small, II-V with single basolateral fovea; sternites II-III and V with 
deep sulci at basolateral margins extending medially and then 
abruptly curving anteriorly, II with large baso-lateral foveae medial 
to sulcal incision, with deep transverse sulcus between medial 
foveae, two teeth projecting anteriorly from posterior margin of 
sulcus at inner margin of metacoxae; mesosternum with large lateral 
mesosternal foveae meeting medially, with small anterior branches, 
median mesosternal fovea present, lateral mesocoxal foveae present, 
median metasternal fovea present. 
Females are very similar and are associated with males solely on 
the basis of identical collection data. The genitalia of all males, 
except for those of hilli n. sp. which have differently modified male 
mesotrochanters, were extracted to check identification. Two spe- 
cies were collected at several sites, but the data associated with the 
specimens collected by John Kethley indicate that these species were 
found in different leaf litters. The following key is based only on 
male features. Males may be recognized by the modified mesotro- 
chanters, the large apical mesotibial spur, and sternites medially 
flattened to concave. Also, males tend to have the outer face of the 
mandibles bearing a more conspicuous medial tooth. 
