13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
BOCAK, REVISION OF DIATRICHALUS FROM NEW GUINEA 29 
Only primary elytra costae reddish except narrow humeral part of elytra, primary elytral 
costa 3 considerably shortened, never reaching further than two thirds of elytral length, 
elytra widest in the middle part, male genitalia as in fig.31 ...... D. rubricostatus sp. n. 
Secondary longitudinal costae completely missing, only seldom some y-shape connec- 
tions of transverse costae present, reticulate cells transverse ......2... 222 .22020... 14 
Secondary longitudinal costae present, although weak and sometimes interrupted, trans- 
verse cells mostly quadrate or of irregular shape, never predominantly transverse ....17 
Elytra with apparent metallic shine, interocular distance 1.3 times longer than maximum 
eye diameter, male genitalia as in fig. 33 0... cele setae eee eee es D. emarginatus sp. n. 
Elytra without apparent metallic shine, mat, dark brown to black ................. 15 
Eyes very small, their interocular distance 1.35-1.56 times longer than maximum eye di- 
AID CLCT Br cB case taye syste te oven Stan Stee ead aed setae ot anak eet vem rte me RI ae Ue a: 16 
Eyes larger, their interocular distance about 1.10 times longer than maximum eye diame- 
ter<phallus-as tn tie. 25. So Wa ra ee aap a ae es RAR ag oer D. biroi Kleine 
Transverse elytral costae dense, regular, reticulate cells strongly transverse, male genitalia 
laterally compressed, phallus with robust ventral process, internal sac with very long, 
slender process. (Eis 5) sy Aria rn Ae ewes ae D. cerberus (Bourgeois) 
Transverse costae less dense, reticulate cells slightly transverse, male genitalia with slender 
Phallus®(Fies23 22). set eit. AN re an Se yates D. xylobanoides Kleine 
Dorsal side of body dark brown to black, without metallic shine .................. 18 
Dorsal side of body with apparent blue, bronze or green metallic shine............. 22 
Male genitalia without any process in ventral side, internal sac very broad (Fig. 26) ..... 
EEE Page i cB a OAD, 11 Br ge VRR el RER cry RAS. 9 D. schawalleri sp. n. 
Male genitalia with apparent process in ventral side of phallus .................... 19 
Phallus open ventrally in basal part, internal sac as in fig. 20 ............ D. piper sp. n. 
Phalluselosed yentrally 0 = Se scene teats Meter N eee SP BUS eee ds 20 
Ventral process robust, tubular basal part of phallus shorter than open apical one, internal 
sac with long, slender process (Figs 12-13, 16) ..........222.... D. tenimberensis (Pic) 
Ventral process smaller, tubular basal part of phallus apparently longer than open apical 
ones, internal sac without long slender process, shape of internal sac very characteristic 
(EIS SAO cst th Bae BAe rn uid ee a A SRR ORS AAR wo ee Red ER 2] 
Male eyes smaller than their interocular distance, elytra relatively long, slightly widened 
posteriorly as in fig. 3, body larger (9.0mm) ................-05- D. fenestratus sp. n. 
Male eyes larger than their interocular distance, elytra relatively shorter, nearly parallel- 
sided, body smaller (5.5.6511) an neuer ac Pee Rte Dt D. sinuaticollis (Pic) 
Elytra apparently dilated posteriorly (Fig. 2) ....... 0... cee eee eee eee eee een: 27 
Elytra parallel-sided or only slightly dilated posteriorly (Fig. 3) ....... 2222222... 23 
Elytra slender, 3.7-4.3 times longer than combined length at humeri, with apparent 
bronze to green metallic shine, body length 7.6-10.6 mm ............. D. aeneus sp. n. 
Elytra broader, 3.4-3.8 times longer than combined length at humeri, metallic shine al- 
ways blue, never bronze, body length 6.3-9.5 mm ......... cece cece tee nennen 24 
Ventral process of phallus very complex (Fig. 19) .................. D. proprius sp. n. 
Ventral process of phallus simple, short (Figs 21, 35-38) ........... eee eee eee eee 25 
Eyes much smaller, their interocular distance at least 1.3 times longer than maximum eye 
diameter, malegenitaliaasintis2T Velten ge Area ni D. dentatus (Kleine, 1926) 
Diameter of eyes approximately as long as their interocular distance ............... 26 
Male antennal segments 3-6 nearly parallel-sided, male genitalia slender in basal part, ap- 
parently widest in apical third (Fig. 38)... +... 000080 ern D. parallelus sp. n. 
Male antennal segments serrate (Fig. 54), phallus more or less parallel-sided (Figs 35-37) 
Bann Mann URN BE ted N ee Venen aed Mea cl D. cyanescens (Bourgeois) 
Male genitalia slender (Fig. 22), interocular distance in male 1.35 times longer than maxi- 
Munmpeyediameter us min. Ti Was aaa ge Dae AS A D. metallicus (Kleine) 
Male genitalia robust (Figs 41-42), eyes as large as their interocular distance ........... 
et a ER EEE BE Tan Me RER le a ee LER ocean BR D. dilatatus sp. n. 
