REPORT OF THE ENTOMOLOGIST. 31 



Aphrophora (Cercopis) quadrangularis is a small, broad, quadraugular 

 insect of a light brownisb-drab color dried, bavinga square or rather jjq 04 

 diamond brov/n linear mark ou its back, and is about 0.35 in/" 

 length. This insect is also known as the frog or cuckoo spittle- 

 insect, as its larva lives in a kind of foam or froth formed on va- 

 rious plants, shrubs, and trees by the larva sucking the sap from 

 the plant by means of its piercer or sucker, and then ejecting the said 

 sap and discharging it through its body, forming small bubbles like 

 froth or foam, and effectually concealing the larva from its enemies; 

 it lives in security until ready to change into the perfect insect. lu 

 Maryland the negroes believe that the small forest horse-flies, so 

 numerous in the woods, are produced from these spots of foam, and it is 

 almost impossible to convince them to the con- No. 25. 



trary. In Vermont these insects are accused 

 of injuring the crops of hay ; it is als found on ^ X^^ 



brambles. The larva of a species oiApliropli- ^M^'^^f^^"^" 



ora and the frothy substance produced by itou '_ 



rag- weed is figured here to show the appearance "^'i^'^^S 



of the foam as it is formed on the i)lauts. 



The larva of Aphroplwra {Memhracis) parallela in June and July forms 

 a spot of white froth upon the bark near the end of the branches -^^ 26 

 of white pine ; the perfect insect is 0.50 in length, of a flattened ' ^' 

 and somewhat oval form, and has its wing-covers deflexed like 

 the roof of a house ; it is of a brown color, with blackish punc- 

 tures on a pale ground, with a smooth whitish line along the 

 back, and a small, smooth whitish spot in the center of each wing- 

 cover ; it frequents pine woods, and is very plentiful in Maryland. 



The lavva, oi AphroiJhor a {Membracis) qiiadrinotata, or the four-spotted 

 spittle-insect, is frequently to be found enveloped in a spot of foam -^^ 27 

 on the branches of the grape-vine ; this insect is 0.33 to 0.35 in 

 length, of a flattened form and brownish color ; it has a blackish 

 spot or mark near the tip of its wing, another on the outer margin, 

 and a third at the base of the upper wing-covers ; as it is found so 

 plentifully sometimes on grape-vines, in all probability it deposits its 

 eggs ou or in the branches, which, when hatched out into young larvaa, 

 suck the sap and weaken the growth of the vine. Insects of the genus 

 Aphrophora are carried off by a hyraeuopterous insect, Gorytis, to pro- 

 vision its nest and serve as food for its young. 



Clasfoptera {Cercopis) proteus is a small insect, very prettily marked with 

 yellow and black, but is somewhat variable in its ornamen- No. 38. 

 tations; it is only 0.15 in length, and is found in cranberry 

 and blueberry fields; no special complaints of its noxious hab- 

 its have been received by the Agricultural Department, al- 

 though various agricultural papers say it is a great pest to 

 Eastern cranberry-growers, injurious to the cranberry culture. 

 Flooding the fields for a couple of days would effectually remove them. 

 The figure is considerably magnified. 



Clastoptera {Cercopis) oltiim, the obtuse or blunt Clastoptera is a small, 

 short, broad, and blunt insect, nearly circular in form; it jf„ 09 

 is 0.25 in length, and of a grayish-brown color in dried 

 specimens, which, when strongly marked, are described as 

 having three brown bands anteriorly and a dark spot near 

 the tip; in the large specimen figured these spots are not 

 shown ; it is found ou the black alder. 



Proconia undata is a tree-hopper, of a brown or blackish color, hav- 



