Species of British Formicidce. ilo 



Fam. 2. MYRMICID.E, Smith. 

 Genus Myrmica, Latr. 

 Mauica, Jurine. 

 This genus of ants is separated from Formica by very essential 

 characters, which consist of the following difterences : the abdo- 

 men has its two basal segments contracted into two nodes, the 

 females and workers are armed with stings, and the pupee are not 

 enclosed in cocoons, but cast off a thin pellicle, like the pupa; of 

 many Fossorial Hymciioptera; their labial palpi are 4-jointed, 

 their maxillary palpi 6-jointed. 



The males and females winged, the latter temporarily so. The 

 males and females furnished with ocelli, which are wanting in the 

 workers.* 



Sp. 1 . i\Iyrmica scahrinodis. 

 Fccmina. — Rufo-testacea, sparse flavido-pilosula ; capite supra, 

 scutello abdominisque dorso medio fuscescentibus; scapo ad 

 basin arcuatim flexo ; capite, thorace et petiolo longitudinaliter 

 striatis, profunde rugosis; metathorace spinis longiusculis; alis 

 hyalinis, versus basin parum infuscatis, stigraate ejusdem coloris 

 distincto. 

 Operaria. — Rufo-testacea, sparse flavido-pilosula, capite supra, 

 abdominisque dorso medio fuscescentibus ; capite, thorace et 

 petiolo longitudinaliter striatis, profunde rugosis ; antennarum 

 scapo ad basin arcuatim flexo, flexura supra angulata ; meta- 

 thoracis spinis longis. 

 Mas, — Nigro-fuscus, nitidus, sparse tenuiter flavido-pilosulus ; 

 mandibulis, pedum articulationibus tarsisque testaceo-palle- 

 scentibus ; antennis fusco-rufescentibus ; scapo longitudine 

 quintae partis totius antenna; ; abdominis apice pallide rufe- 

 scentibus, 



Myrmica scabrinodis, Nyland. Adno. JNIon. Form., p. 9o0, 3, 

 ^, $, ^ ; Foerster, llym. Stud. Form., 

 6(5, 36. 

 Myrmica rubra, Curtis, Trans. Linn. Soc, xxi. 213, 1. 

 Myrmica ccespitum, Zett. Ins. Lapp., 450, 1 ^. 



Female. — Length 2| lines. The head above and the clypeus 

 fuscous ; beneath, the sides, the face on each side of the clypeus, 



* None of the British species of the genus Myrmica spin a cocoon, and this 

 appears to be the case with the majority of the Myrmicida ; but the genus 

 Myrmecia, Fabr., is an exception to the rule. I possess the pupa, and silken co- 

 coon from which it was extracted, of a species closely allied to M. gidosa, from 

 New Holland. 



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