AN INTRODUCTION TO ENTOi: 



furnished with a pterostigma. Th. .ml pair 



of \\ - tl icnt of the : dilated ami 



bilo d the fourth L The a': l>mcn in the fen 



with a long ovipositor. The larviu differ from all other 

 iai in not being aquatic; th< .-and uiuler hark. 



Th< mis that have no ocelli have been pi 



by some writers in a distinct genus. lm>iillia. 



-.\\\\- II. 

 (Ant-lions, I.(iii--:ci>i^(/ I-'/it-s. it al.) 



The Hemerobiadae is a family of considerable extent ; and r 

 :atives of it are very common throughout our country. A 

 rule they are delicate insects, with large, gau/.y wings. The- 



. having no anal space ; in this respect they resemble the 

 wings of the Panorpidiu. But the members of this family differ 

 from the Panorpidae in not having the mouth-parts prolonged into 

 a rostrum. The larvae of the Hemerobiadae are predaceous ; and 

 they are remarkable for having the mouth-parts formed for sucking. 

 They thus form an apparent exception to the characters of the order 

 Neuroptera. The form of these mouth-parts is a very unusual one. 

 It is well shown in the larva of the Ant-lion, where these organs are 

 large enough to be easily studied. The mandibles are very long; 

 on the ventral aspect of each there is a furrow the entire length ; 

 into this furrow the long and slender maxilla fits. In this way the 

 mandible and maxilla of each side form a tube through which the 

 blood of the pre^ of the insect can be drawn. 



Five .sub-families are represented in our fauna. These' can be 

 ated by the following table : 



TABLE OF SUIJ-1 AMII.IKS OF HEMEROBIAD^B. 



A. Prothorax not greatly elongated ; the three pairs of legs similar in structure. 

 B. Wings with ver us, and covered with whitish powder. 



i. CONIOPI i ky<;iN,c. 



BB. Wings with mimerou< vnns. and not covered with powder. 

 C. Antennae without terminal i-Mlan^-im-nt. 



D. Subcostal vein joined to the median before the end of the wintj; the 

 principal sector parallel to the median vein and .uivin^ rise to tin- 

 other sectors.t (Sisyra, Polystcechvt 2. II i M i 



* HcmcrobTadae, HemcrObius: hen life. 



f For explanation of terms see Fig. 71, p. 73. 



