S. Mahunka szerk.: Folia Entomologica Hungarica 58. (Budapest, 1997)

merous than in October - have still stayed at their overwintering sites. Seventeen specimens were collected on the wall during that day. We repeated collecting on the 18th of May on the wall, near the river bank and on other parts of its inundation area, and we caught more than 20,000 dipterous specimens but there was no Sphyracephala among them. It is a matter of course, we will continue collectings in that site in order to know the other elements of the bionomics of this unique species. Sphyracephala europaea L. Papp et Földvári, sp. n. Measurements in mm: body length 3.48 (holotype male), 3.10-3.50 (paratype males), 3.375-4.05 (paratype females); wing length 3.13 (holotype), 2.75-3.20 (paratype males), 3.05-3.65 (paratype females); wing width 1.025, 0.88-1.05, 0.93-1.13; width of head at widest 2.20, 1.903-2.20, 1.703-2.15. Head bicolorous: irons (postfrons), vertex and occiput (including eyestalks) shining black though covered with dense grey microtrichia, facial plate, cheeks and genae yellow, ventral surface of eyestalks with a narrow dark band down to peristomium (since ptilinal suture is only horizontal, a separation of face, cheeks and genae is imaginary). Thorax and abdomen shining black but mostly covered with medium long grey microtrichia, which are removable by rubbing; bare patches on ventral half of anepisternum and anterodorsal part of katepisternum and a smaller one on meron. Head extremely wide: widest among the known species of Sphyracephala (Figs 1, 3, see more below). Eyes small, vertically oval on long but thick eyestalks. Frons (postfrons) with two pairs of setae: accepting Peterson's (1987) interpretation, the medial pair is called upper orbital, the lateral pair is outer vertical. Clypeus rather small (Figs 2, 3), shining black, proboscis short, very pale suctorial surface with numerous pseudotracheae. Antennae very small, yellow with a short (ca. 0.50 mm) bare subapical arista and a rounded 1st flagellomere. Thorax similar to that of Sphyracephala hrevicornis (for details see Peterson 1987) with a pair of strong posterior notopleurals, 1 pair of very long (somewhat posteriorly placed) supra-alar. Thoracic microchaetae white, only 1 (sagittal) row of acrostichals, scattered microchaetae on and posteriorly to postpronotum and on all other more anterior parts of thorax but only 1 pair of dorsocentral and intra-alar rows. Pleura without any characteristic setae. Scutellum short (0.26 mm on holotype), apical scutellars arise from c. 0.1 mm long apicolateral protuberances, scutellar bristles rather long, 0.62 mm on holotype. Laterotergite with a strong thick spiniform process. Wing long, slender with comparatively large alula, basically almost transparent, veins brown, ochreous to light brown in some basal sections. Wing apex with a brown spot extending near to the end of R

2

+3 (Fig. 1); crossvein area also with a diffuse brown patch; this is distinctly smaller than in Sphyracephala hrevicornis: mostly reaching only the middle of second radial cell, at most reaching R4+5, and usually rather faint on the posterior lower edge of dm-cu. No darkenings on other areas of wings, in contrast to Sphyracephala babadjanidesi or S. hrevicornis. Wings covered with evenly spaced, comparatively long trichia, without bare patches. Costa without any break, extending slightly over M

1+2, costal fringe fine, without any setae, but only hairs including basicosta. Subcosta complete, running close to Ri and ending at a distal third of the section between humeral vein and Ri end. R2+3 less sinuate than in Sphyracephala hrevicornis (Fig. 1; cf. Fig. 2 of Peterson 1987), similarly to that of S. babadjanidesi Zaitzev, 1919. Intracross-