Dr. Steinmann Henrik szerk.: Folia Entomologica Hungarica 23/1-12. (Budapest, 1970)

motic nerves. Beyond the frontal bifurcation, the nervus labralis advances anteriorad as a pair on both sides of the foregut, and then again divides. In the nerve trunk, decurrent dorsally, there are 5 nerves in general: the nervus frontotormalis

, the n. frontolabralis

, the n. frontolateralis

, and 2 motoric nerves (n -7 and n - 8), that is, those innervating the fronto-tormal and the fronto-labral muscles. The ventrally decurrent nerve trunk soon emits a lateral branch which again divides after a shorter or longer section, being the anastomosis of the nervus cavi mandibularis and the nervus mandibularis

. The anastomotic connection appears in many types, but there occur also groups lacking it. The connection presumably funcitons in harmonizing the movements of the labrum and the mandible. These latter may namely damage each other in case of an inexact alignment, since in a great number of types the labrum covers also a large part of the mandible, and the robust, serrated mandible might heavily injure the prematurely closing labrum.In mouthparts of the nongnawing type the anastomosis has no importance. The labral nerve trunk contains 5 typical nerves: the first is the nervus anteclypei, the second the nervus postclypei, followed by the nerve of the musculus compressor labralis anterior and that of the musculus compressor labralis posterior, then the trunk terminates in the sensory bristles of the labrum. A tipikus rovarfej anatómiáját entomológiai kézikönyvekben általában igen röviden láthatjuk tárgyalva. Összefoglaló, nagyobb munkákban, pl. SNODGRASS és WEBER munkáiban részletesebben is olvashatunk róla, azonban alak- és szervezettanát minden esetben csak a példák halmazaiban, kivételek tükrében vizsgálták, irták le, igy a tipikus rovarfejről tulajdonképpen azonos nomenklatúrával még nem ismerkedhettünk meg. Jelen közlemény so-