Stuttgarter Beitrage zur Naturkunde 
Serie A (Biologie) 
Herausgeber: 
Staatliches Museum fiir Naturkunde, Rosenstein 1, D-70191 Stuttgart 

Stuttgarter Beitr. Naturk. Nr. 622 Stuttgart, 20. 7. 2001 
Revision of the Genus Diatrichalus Kleine 
from New Guinea (Coleoptera: Lycidae) 
By Ladislav Bocak, Olomouc 
With 55 figures 
Summary 
New Guinean species of the genus Diatrichalus Kleine, 1926 are revised. Altogether 27 
Diatrichalus species were found, 17 of them are described here: Diatrichalus aeneus sp. n., D. 
bipunctatus sp.n., D. dilatatus sp. n., D. emarginatus sp. n., D. fasciatus sp. n., D. fenestratus 
sp. n., D. habbema sp. n., D. humeralis sp. n., D. pallidihumeralis sp. n., D. parallelus sp. n., 
D. piper sp. n., D. proprius sp. n., D. rubricostatus sp. n., D. schawalleri sp. n., D. sedlacekiae 
sp. n., D. striatus sp. n., and D. wauensis sp. n. 
Additional 6 species were combined for the first time with Diatrichalus Kleine, 1926, all of 
them were originally placed in Trichalus Waterhouse, 1877: D. cyanescens (Bourgeois, 1900), 
comb. n., D. dentatus (Kleine, 1926), comb. n., D. mancus (Kleine, 1926), comb. n., D. me- 
tallicus (Kleine, 1935), comb. n., D. secretus (Kleine, 1935), comb. n. and D. sinuaticollis (Pic, 
1923), comb. n. D. ternatensis Kleine, 1930 is transferred to the genus Trichalus Waterhouse, 
1877. 
Four species earlier classified in Diatrichalus from New Guinea are redescribed, illustra- 
tions of critical morphological characters and a key for New Guinean Diatrichalus are pro- 
vided. The relationships between species are shortly disccused. 
The following species known from adjacent areas are proposed to be members of the genus 
Diatrichalus Kleine, 1926 — from the genus Trichalus Waterhouse, 1877: Diatrichalus aptus 
(Kleine, 1926), comb. n., D. assimilis (Kleine, 1926), comb. n., D. funereus (Blackburn, 1900), 
comb. n., D. insulanus (Kleine, 1933), comb. n., D. kershawi (Lea, 1908), comb. n., D. niger 
(Waterhouse, 1879) comb. n., D. semicostatus (Blackburn, 1891), comb. n., D. signatus (Klei- 
ne, 1939), comb. n., D. typicus (Kleine, 1939), comb. n.; from the genus Flabellotrichalus Pic, 
1921: Diatrichalus vicarıns (Kleine, 1935), comb. n., D. puerilis (Kleine, 1935), comb. n., and 
D. salomonensis (Kleine, 1933), comb. n. 
The following species names are considered to be junior subjective synonyms: Trichalus ni- 
gricolor Pic, 1927, syn. n., Trichalus niger var. notaticollis Pic, 1927, syn. n., Trichalus niger var. 
angustatus Pic, 1927, syn. n. and Diatrichalus concolor Kleine, 1927, syn. n. [all of D. niger 
(Waterhouse, 1879)]; Trichalus completus Pic, 1923, syn. n. [= Diatrichalus cerberus (Bourge- 
ois, 1900)]. 
Zusammenfassung 
Die Arten der Gattung Diatrichalus Kleine, 1926, aus Neu Guinea werden revidiert. Insge- 
samt werden 27 Diatrichalus-Arten nachgewiesen, 17 davon werden hier beschrieben: Dia- 
