A morphological study and comparison of the mouth parts of some Hymenoptera: A comparative study of the mouth parts of Vespa maculata Linn Review
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ... A MORPHOLOGICAL STUDY AND COM-PARISON OF THE MOUTH PARTS OF SOME HYMENOPTERA. INTRODUCTION. I. DELIMITATION In this treatise I purpose to discuss the morphology of the mouth-parts of the worker white-faced hornet Vespa maculata Linn.; the worker hone'y-bee Apis mellifica Linn.; the female of one of the solitary bees Andrena perplexa Smith; and a Female saw-fly Macremphytus varians Norton. The discussion will be approached from a comparative stand-point. Some of these forms have been carefully and extensively studied, especially the worker honey-bee; others only superficially and in passing. The purpose of this work is two-fold, viz: a) to work out carefully the different structure of the mouthparts of the above-mentioned insects; b) to compare these different structures from a morphological point of view, attempting to bring out the similarities and the differences. In order to show the likenesses and the unlikenesses the insects have been chosen from among the Hymenoptera, of which they are, in a certain sense, types. Of these types only the females or the undeveloped females, the workers, have been studied. Consequently all descriptions and comparisons must necessarily be confined to them. The worker honey-bee is a type of the long-tongued bee; A. perplexa is an example of a short-tongued bee; the worker white-faced hornet is an illustration of chewing and sucking mouth-parts; and the saw-fly gives evidence of cutting and sucking mouth-parts. These particular kinds of mouth-parts have been selected for study Contribution from the Biological Laboratory of the Catholic University of America, No. 5. 5 because they show in a marked degree the striking departure, in the respective insects, from the generalized mouth-parts of a primitive insect. II.... Read more...
