24 STUTTGARTER BEITRAGE ZUR NATURKUNDE Ser. A, Nr. 622 
midline, with acutely projected hind angles and nearly straight lateral margins with- 
out any tooth. Elytra with primary costae 2-4 fully developed, costa 3 only slightly 
shortened, secondary costae weak, but regularly present and nearly straight, reticu- 
late cells quadrate in average. Male genitalia with slender phallus and broad sclero- 
tized part of internal sac (Fig. 26). 2: unknown. 
Measurements: Length of body 8.35 mm, width at humeri 1.86 mm, length of 
pronotum 0.89 mm, width of pronotum 1.50mm. d: interocular distance 0.50 mm, 
maximum diameter of eyes 0.54 mm. 
Distribution: New Guinea, known from the type locality only. 
3.21. Diatrichalus secretus (Kleine, 1935), comb. n. (Fig. 34) 
Trichalus secretus Kleine, 1935 (KLEINE, 1935c: 317). 
Type material: Holotype 6, “Papua Kokoda, 1200 ft, VIII. 1933. L. E. CHEEsMAN, BM 
1933.577” (BMNH). 
Other material examined: d, New Guinea, SE, Mamai Pltn., E of Port Glasgow, 
150 m, 7. II. 1965, R. STRAATMAN; same locality and collector, with following data: 3, 30. I. 
1965,2 dd 5. II. 1965, 3, 2. II. 1965 (BPBM, LMBC). 
Differential diagnosis: D. secretus differs from other Diatrichalus with big 
eyes by the light yellow substantial part of pronotum. 
Redescription: 3. Body small to medium sized, slightly widened posteriorly, 
dark brown, with wide lateral margins of pronotum light yellow. Head small, with 
large, prominent eyes, maximum eye diamter 1.13 times longer than interocular dis- 
tance, head surface shining, covered with sparse, brown pubescence, antennal tuber- 
cles followed by very deep transverse depression. Pronotum 1.63 wider than long at 
midline, without apparent tubercle at lateral margin, median areola regularly con- 
nected with anterior margin through short keel. Elytra with costae 2-4 well devel- 
oped, costa 3 only slightly shortened, secondary costae weak, seldom missing, retic- 
ulate cells irregular, in average quadrate. Phallus widened apically (Fig. 34). 2: un- 
known. 
Variability: The black patch in the middle of pronotum is variable in size and 
can be missing in an extreme case. 
Measurements: Length of body 6.15 mm, width at humeri 1.54 mm, length of 
pronotum 0.79 mm, width of pronotum 1.29mm. d: interocular distance 0.44 mm, 
maximum diameter of eyes 0.50 mm. 
Distribution: New Guinea, known from south eastern part of island only. 
3.22. Diatrichalus sedlacekiae sp. n. (Fig. 14) 
Type material: Holotype d, NE New Guinea, Morobe District, Mt. Kaindi, 1860 m, 17. 
XII. 1967 (BPBM). 
Name derivation: This species is named in honour of Mrs. M. SEDLACER (Brookfield, 
Australia), who collected many species of New Guinean Lycidae during her journeys with her 
husband Mr. J. SEDLACEK. 
Differential diagnosis: D. sedlacekiae reminds D. humeralis in body col- 
oration but it differs by relatively smaller eyes, more slender, more acutely serrate 
antennae, more bright humeral part of elytra and different shape of male genitalia 
(Fig. 14). 
