APPENDIX . 711 



branched towards the posterior border of the wing, and in 

 Eugereon the spaces between the first three nervures next 

 the anterior border are connected by straight cross-nervures. 

 There are also important differences in the branching of the 

 main nervures." 



ABDOMINAL SENSE ORGANS. On p. 17 the remarkable 

 antenniform abdominal appendages of Mantis tesseUata are fig- 

 ured as an illustration of what we have called " sensorio-geni- 

 ital" organs. Dr. Dohrn has shown that the jointed abdominal 

 appendages of Gryllotalpa are true sensory organs. More 

 recently we have observed sense organs (probably of smell) 

 in the anal stylets of the cockroach (Periplaneta ^Imericana), 

 consisting of about ninety minute sacs, situated in single rows 

 on the upper side of each joint of the stylets. They are like 

 similar organs in the antennae of the same insect. Similar 

 organs are situated on the female anal stylets of Chrysopila, a 

 Leptis-like fly. These also are like the single sacs situated on 

 the ends of the labial and maxillary palpi of Perla. American 

 Naturalist, IV. p. 690. 



INJURIOUS AND BENEFICIAL INSECTS. Explanation of Plate 14. Of 

 much interest to gardeners is the bean weevil (Bruchus varicornis of 

 Leconte, fig. 8, bean containing several grubs; 8a, pupa). This 

 is the well known and very destructive bean weevil of Europe, con- 

 cerning which Mr. Angus writes from West Farms, N. Y., to the 

 author : " I send you a sample of beans which I think will startle you 

 if you have not seen such before. I discovered this beetle in the kid- 

 ney or bush bean a few years ago, and they have been greatly on the 

 increase every year since. I might say much on the gloomy prospect 

 before us in the cultivation of this important garden and farm pro- 

 duct if the work of this insect is not cut short by some means or 

 other. The pea Bruchus is bad enough, but this is worse." 



Another insect recently brought to the notice of farmers, is the 

 corn Sphenophorus (S. zece Walsh, fig. 11), of which Mr. R. Howcll, 

 of Tiago County, New York, writes, June 14, 1869: "This is the 

 fourth year they have infested the newly planted corn in this vicinity. 

 The enclosed specimens were taken on the llth instant. I presume 

 that they have been in every hill of corn in my field. They pierce the 

 young corn in numerous places, so that each blade has from one to 

 six or eight holes of the size of a pin, or larger, and I found a num- 

 ber last Friday about an inch under ground hanging to young stalks 



