808 General Notes. [September, 
with pleasure the Seed Catalogue, issued by Damman & Co., of 
San Giovanni a Teduccio (near Naples), Italy. Botanic gardens 
can secure many desirable plants from this catalogue-——The 
first number of Cooke’s British Desmids has just come to hand. 
It resembles in text and plates the well-known “ British Fresh- 
water Algz,” by the same author. It is to be completed in 
about ‘ten parts, including all told about eighty plates, and will 
cost about twelve or thirteen dollars. 
ENTOMOLOGY. 
A New ARRANGEMENT OF THE ORDERS OF Insects.—In pre- 
paring for the press our larger “ Zoology,” also in our “ First 
Lesson in Zoology,” which has just appeared from the press, we 
have admitted sixteen instead of eight orders of insects heretofore 
recognized by us. Below is given a very brief synopsis, pre- 
pared for popular use, of this class of insects. The Pseudoneu- 
roptera as the result of farther examination and reflection, are 
dismembered into the Platyptera (which was characterized in the 
Third Report U. S. Entomological Commission), the Odonata 
with justice, by Brauer, to a distinct order. Our reasons for this 
change in classification we hope to present on a future occasion. 
ORDERS OF INSECTS. 
1. Wingless, often with a spring...... Ue eka Thysanura : Spring-tails, ete., 
2 Fore wings minute, elytra-like Dermaptèra + Earwig. 
H s net-veined; fore wings narrow; hind 
‘win folded... ee, Orthopiera: Locusts, Grasshoppets: 
- 4. Four net-veined wings; mouth-parts adapted eer 
oor Witting. a a. p POC Platyptera : White Ants, Bird-ice. 
5. Wings, net-veined, equal .. Odonata: Dragon-flies. 
6. Wings net-veined, unequal..............-- Plectoptera: May ties. f 
7. Mouth beak-like, but with palpi...... SADR Thysanoptera : Thrips. i 
8. Mouth-parts forming a beak for sucking; no : 
- palpi .. Hemiptera: Bugs. _ Fly, etc: : 
9. Wings net-yeined; metamorphosis complete. Mewroplera : Lace-winged Fiy, 
10. Wings long and narrow. Mecaptera: Panorpa. 
11. Wings not net-veined z Trichoptera - Caddis-fly- 
12. Fore wings sheathing the hinder ones....... Coleoptera: Beetles. 
13. Wingless, parasitic......... Siphonaptera : Flea. 
14, One pair of wings Tine: Fie 
s sao y scaled,..... errs iipit : Butters i 
6. Four clear wings; hinder pair small ; a tongue. Hymenoptera: Bees, : 
aus ae r LA. S. Packard. 
Jera Cruz, publishes in Archiv f. Mikr. Anat., xxvi, 296 (June 
extended observations on several species 0! ten 
Each beetle has three lamps, a pair Ot $ 
