LOUSE FAMILY TROCHILIPHAGIDAE — CARRIKER 



331 



Similar to sauli but differs from it in having a concave, submarginal 

 line across frons; head short and wide, 0.53X0.64; frons 0.42; temples 

 strongly expanded laterally with line of margin broken at prominent 

 eye; sucking apparatus heavy basally, with thickened basal prongs; 

 propulsion sclerite short and thickened. 



The measurements (in mm.) for T. sauli and T. mandibularis are 

 as follows: 



T. sauli T. viandibularis 



Body 



['frons 

 Head< temples 



^occiput 

 Prothorax 

 Pterothorax 

 Abdomen 



TrochiliphagiiSi new genus 



Type species: Trochiliphagus lazulus, new species. 



Diagnosis : Similar to certain species of Ricinus in general shape and 

 structure of the head, thorax, and abdomen, but with the same type 

 of sucking mouth parts as in Trochiloecetes. The mandibles, instead 

 of being L-shaped, as in Trochiloecetes, consist of minute, tapering 

 sclerites, often of irregular shape and with the distal end varying 

 between a point and a rounded tip. Their bases are attached to the 

 inner edge of the premarginal carinae, the attachment apparently 

 being flexible (see figs. 1/ and 2). 



The sucking apparatus is smaller than in Trochiloecetes and with 

 certain differences in structure clearly illustrated in figure 1, a and/. 

 There is a generic conformity in the general shape of the head and in 

 the absence of darker markings, following the type of Ricinus micro- 

 cephalum Kellogg, except that the head is longer and usually narrower 

 at the temples. 



The thoracic and abdominal structure is similiar to the genus 

 Ricinus. I have two males of this genus from Selasphorus Jlammula, 

 the same individual host from which was taken the type of Trochiloe- 

 cetes doratophorus. These genitalia are very similiar to those of 

 Trochiloecetes columbianus, and not at all like those of Ricinus, of 

 which I have examined numerous specimens, and of which a figure is 

 presented (see fig. 12c-e). 



The labral lobes are alwa} T s well developed, often enormously ex- 

 panded, curving forward to the line of the frons. Even those of lesser 

 development protrude noticeably beyond the lateral margins of the 

 head. 



