SCIENTIFIC SURVEY. 191 



species belonging to various genera of aculeate Hymenoptera ; the 

 comparatively large size of these parasites, causes a distension of 

 the abdomen of the Ilymenopteron affected, and, on close observa- 

 tion, the heads of the pupa cases may be seen emerging between 

 the segments. The head of the pupa case of the male is convex, 

 that of the female is flat ; specimens containing male pupae can be 

 kept confined with proper food, until the parasite is hatched. 

 Stylops inhabits bees, of the genus Andraena. I have never met 

 with specimens. Xenon Peckii, lives in our common wasp Polistes 

 fuscafa. I have seen stylopized individuals of Odtjnerus quadricor- 

 nis, and of a large species of Sphex." — Le Gonte. Stylops has 

 four joints, Xenos, six joints to the antennae. There is a spe- 

 cies of Xenos, only found, thus far, in Nova Scotia, which must 

 likewise occur in Maine. They are found at different seasons of 

 the year, but mostly in April and May. They have been taken by 

 sweeping grass in August. 



The three following families are of great extent, and do great 

 mischief to agriculturists, by the great variety in their modes of 

 attack upon plants. 



Curculio)ndae—{See Fig. 21.) This group is at once recog- 

 nized, by having the head lengthened into a long snout, near the 

 middle of which are situated the elbowed antennae. Their bodies 

 are hard and round, and often very minute in size. The beetles are 

 very timid, and quickly feign death. The larvae are white, thick, 

 fleshy, legless grubs, with tubercles, instead of limbs, and armed 

 with thick, arched, strong jaws. They feed on nuts, seeds, the pith 

 of plants, leaves or flowers ; while some are leaf miners, and others 

 make galls. Before they transform they spin a silky cocoon. 



Bruchus pisi is short and oblong, it lays its eggs on the pea, 

 when in flower, and lives in the pea till the following spring. 



Anthrihus is parasitic in the body of Coccus. Brentkus inhabits 

 the solid trunks of oaks. Apion inhabits the seeds of clover. Hy- 

 lobius pales is found under the bark of the pine, where Pissodes stroU 

 in all its stages occurs. Bhynchaenus nenuphar infests the plum. 

 Calandra granaria, the grain weevil, is an eighth of an inch long, 

 and consumes the interior of wheat. Balaninus forms galls on the 

 willow. Scolyfus, Xyloteres and Tomicus are cylindrical bark bor- 

 ers; "they form galleries in the bark, or sap wood, often causing 

 the disease called fire blight." _ • 



Cerambycidae. The Longicorns are insects with long bodies, 



