54 6 



CALIFORNIA ACADEMY OF SCIENCES. 



Turdus ustulatus. Sialia sialis. 



Menopon incertuni. Docophorus incisus. 



Merula inigratoria. 



Docophorus communis. 



Nirinus vulgatus. 

 simplex. 



EXPLANATION OF PLATES. 



PLATE LX. — Fig. 1, Head of Colpocephalum flavescens, under side; a 

 labrum, b labial palpi, c maxillary palpi, d antennas (after Nitzsch). 

 Fig. 2, Maxilla of Trinotum eonspurcatum (after Nitzsch). Fig. 3, Labium 

 of Trinotum eonspurcatum (after Nitzsch). Fig. 4, Labium of Tetropthal- 

 mus chilensis [Menopon titan.]; m mentum, p I labial palpus, g glossa, pg 

 paraglossa, hy hypopharynx (after Grosse). Fig. 5, Labium of a Nirmus; 

 g glossa, pg paraglossa (after Grosse). Fig. 6, Head, ventral aspect, with 

 median part of labium cut away, of Ancistrona gigas; lb labrum, md man- 

 dible, lp labial palpus, hy hypopharynx, fk labial fork, af anteunary 

 fossa. Fig. 7, Labium, ventral aspect, of Ancistrona gigas; s m submentum, 

 m mentum, p r labial prong, p palpifer, lp labial palpus, lig ligula, g 

 glossa, pg paraglossa. Fig. 8, Maxilla of Ancistrona gigas. Fig. 9, Eight 

 mandible, ventral aspect, of Ancistrona gigas; ten tendon, mus muscle, 

 vchr ventral chitinous rod, dchr dorsal chitinous rod. Fig. 10, Mandi- 

 bles, ventral aspect, of Ancistrona gigas; c condyles, r right mandible, 

 Heft mandible. Fig. 11, Hypopharynx of Ancistrona gigas. Fig. 12, Left 

 labial fork, ventral aspect, of Ancistrona, gigas; mus muscle. 



PLATE LXI. — Fig. 1, Head, ventral aspect, of Lcumobothrium sp.; sm 

 submentum, m mentum, ant antenna, clyp clypeus, lb labrum, md 

 mandible, mx maxilla, g glossa, pg paraglossa, lp labial palpus. Fig. 2, 

 Mandibles, ventral aspect, of L<emobothrium sp. ; c condyles, r right man- 

 dible, I left mandible. Fig. 3, Right maxilla, ventral aspect, of Lttmo- 

 bothrium sp. Fig. 4, Labium, ventral aspect, of Lmnobothrium sp.; sm 

 submentum, m mentum, g glossa, pg paraglossa, pf palpifer, lp labial 

 palpus. Fig. 5, Labial glands of Lamobothrium sp. Fig. 6, Left maxilla, 

 ventral aspect, of Ooniodes cervinicomis. Fig. 7, Labium, ventral aspect, 

 of Goniodes cervinicomis; g glossa, pg paraglossa. Fig. 8, Mandibles, 

 posterior aspect, of Goniodes cervinicomis. Fig. 9, Right mandible, poste- 

 rior aspect, of Goniodes cervinicomis; c condyle, ch pis chitinous plates. 



PLATE LXII. — Fig. 1, Head, ventral aspect, with labium represented 

 as transparent, of Enrymetopus taurus; ant antenna, tr trabecula, md 

 mandible, clyp ciypeus, g glossa, pg paraglossa, <e s oesophageal sclerite, 

 Ig "lingual gland." Fig. 2, Oesophageal sclerite, dorsal aspect, of Eury- 

 metopus taurus; d duct, do opening of duct, m g middle groove, ant h 

 anterior horn, bs "bonnet string." Fig. 3, Oesophageal sclerite, lateral 



