Anatomy of the Male Genital Tube in Coleoptera. 509 



Eumicrus tarsatns (PL LVII fig, 57). 



Median lobe tubular, slightly curved, with large median orifice at 

 distal end and small median foramen at base. Lateral lobes large, 

 broad and closely pressed to sides of median lobe; they extend 

 beyond the end of the median lobe Avhere the tips are consolidated 

 into a single point, entirely enveloping the ventro-apical portion of 

 the median lobe. Although the lateral lobes are pressed very closely 

 to the median lobe, yet they are not consolidated thereto, and can 

 be parted without damage. Internal sac small with a curved chitinous 

 process (a) bearing the opening of the ejaculatury duct at its tip. 



Lejitomastax coquereli. 



Median lobe similar to Eumicrus tavsatus ; the lateral lobes are 

 broad and flat but do not meet and become consolidated at their 

 tips. Internal sac small, with a chitinous process ending in a short 

 flagellum on which the ejaculatory duct opens. 



The family Scydmaenidae exhibit a great diversity of 

 form, but all appear to be of one type. Median lobe more 

 or less tubular with a large median orifice and a small 

 median foramen more or less inclined to the dorsal face. 

 The lateral lobes articulated to the base of the median 

 lobe on the dorsal face of the median foramen. Internal 

 sac bearing armature. The point of articulation being on 

 the dorsal side of the median foramen distinguishes this 

 family from the Staphylinidae wherein the point of 

 articulation is on the ventral side. 



The distinguished French entomologist, M. de Peyerim- 

 hoff, has published a memoir on the male structures of 

 Scydmaenidae, in which he expresses the opinion that the 

 structures are in some species variable. We would point 

 to our remarks under Stcnichnus coUaris as possibly 

 explaining the discrepancies he remarks on. 



Family PSELAPHIDAE. 



Forms examined : Sar/ola sp. (not in Brit. Mus.), New 

 Zealand. Trichonyx si'lcicollis Reich., Brockenhurst. £ry- 

 axis impressa Panz., and B. juncoruni Leach, Brockenhurst. 

 Physa inflata Sharp, New Zealantl. Palimholus sp. (not 

 in Brit. Mus.), New South Wales. 



Figs. 58, 59, 60 and 230 Pis. LI and LII. 



TRANS. ENT. SOC. LOND. 1912.— FART 111. (DEC; M M 



